A list of all physical traits that the main cast of Happy Tree Friends, and some other characters, mainly follow.
A majority of characters in Happy Tree Friends have buckteeth. These are seen most prominently when characters have their mouths closed, though the buckteeth are still visible when they talk, scream, etc. The buckteeth usually cannot be seen when characters grit their teeth or scream with contorted facial expressions. Similarly, when characters grin widely, such the trademark grins of Lifty and Shifty, the buckteeth can become hidden amongst their other teeth.
The buckteeth themselves have gone through a transformation as the series progressed. They were originally the general shape of a trapezium with very sharp corners and a flat tip. Later in the TV series, the corners became more rounded, the tips of the teeth are slightly curved, and they have been widened, but the general trapezium shape still remains.
Toothy has buckteeth that are larger than those of the other characters, with a huge gap between them that some attribute to diastema. Toothy's name is derived from his larger than normal buckteeth, though there have been instances where his buckteeth were normal. In some episodes, like Treasure These Idol Moments and Class Act, Toothy's buckteeth change back and forth between normal and large and gaped several times. In other episodes, such as Eye Candy, Toothy has normal buckteeth throughout the duration of the episode. This problem was said to be caused by laziness on the part of the animators, though this was fixed when Fatkat took over the animation for the television series.
In Operation: Tiger Bomb the only character to have buckteeth was Mouse Ka-Boom, which is odd considering that Flippy has buckteeth in the normal series. This could indicate that the animation of the Ka-Pow simply doesn't utilize the bucktooth drawing format and that characters from Ka-pow would have buckteeth if they were animated in a typical Happy Tree Friends way, this is supported by the body design of Flippy being vastly different from normal Happy Tree Friends animation as well. However, assuming this is a animation style that does not typically show buckteeth, Mouse Ka-Boom may have them because he is a mouse, which generally have large front teeth.
Flippy usually has buckteeth in the normal series. However, when he flips-out, his teeth change. They became crooked in the first two seasons of the internet shorts (crooked teeth are still used fairly often with other Happy Tree Friends when they are scared). In the TV series and further on, Flippy's teeth become sharp when he flips out. Due to his turtleneck, The Mole's mouth is not visible (but he is proven to have buckteeth as shown in Pet Peeve).
Sometimes when characters scream, their teeth become crooked, with one tooth on the upper side and one on the lower side of their mouth. The Generic Tree Friends are occasionally seen to have buckteeth, very few other characters (anthropomorphic or not) have them. None of the characters in Three Courses of Death or Mole in the City have buckteeth, though the Generic Tree Ninjas may have buckteeth beneath their masks, one skeleton was seen when Buddhist Monkey disintegrated one internally, and it shows teeth that aren't buckteeth, however, they are simply just a series of white blocks, so this may not be their official teeth.
Buckteeth, though common throughout the show, do not appear on all characters. Of the 21 regular characters, Lumpy, Sniffles, and Cro-Marmot don't have buckteeth. Sniffles' obviously doesn't have buckteeth because of his trunk-like snout and Lumpy simply doesn't have them at all, more often than not, his teeth are halfway up the underside of his nose. Cro-Marmot is stuck in a block of ice, wearing an expression that doesn't show any buckteeth, though he also didn't have them in Dino-Sore Days when he was not encased in ice and this was the animation style was different, such as in "Ka-Pow!". The Demon has red sharp teeth on the beak. Sneaky has no teeth. Truffles, Char Sui and Pig Child are pigs and don't have buckteeth.
The heart-shaped noses are clearly based on the similar facial concept of the Care Bears and the Care Bear Cousins. With the exception of Lumpy and Sniffles, all the main characters have the same pink heart-shaped noses. The Tiger General and his soldiers have blue noses, however, these noses are closer to a "v" shape than a heart. Sneaky from W.A.R. Journal doesn't have a visible nose because of his reptilian design. Truffles, being a pig, has a pig snout.
A character's skull also has a heart-shaped hole where the nose would be. It used to be an upside-down heart but it was changed to right-side up. Lumpy has his two nostril holes on his skull, and a generic tree ninja was shown to have two half-triangles, not completely dissimilar from a human skull.
Sniffles has a trunk-like snout instead of a typical nose. However, his snout was originally longer before being shortened at the tail end of Season 2. It would shrink slightly more during the fourth season of the Internet series.
Pac-Man EyesMost of the characters have eyes with pupils the shape of an ovular Pac-Man. Evil Flippy, Lifty, Shifty, Lumpy and Nutty are the only main characters who don't have Pac-Man eyes (though Lifty and Shifty had Pac-Man eyes in early episodes). It is unknown whether Cro-Marmot and The Mole have the same eyes as the others, as The Mole wears typical shaded glasses and Cro-Marmot's fringe is covering his eyes. Cub and Mr. Pickels have small black dotted eyes (which still form the Pac-Man shape). The Rat and The Dark Shadow Lord don't have Pac-Man eyes. When Flippy flips out, his eyes go from Pac-Man to irises and his pupils are completely round. Similarly, Pupils often dilate or constrict depending on a character's mood
Sometimes when a character is injured, killed or panics, the eyelid or the area next to the eye may become little darkened (example Cuddles in episode Water You Wading For or Petunia in Hello Dolly), or otherwise have small stripes below the eyes.
Notable exceptions to Pac-Man eyes/pupils are:
- Lumpy: Googly eyes
- Nutty: One googly eye, one flippy-like eye
- Flippy: Yellow/green eyes, or once blue, when flipped out
- The Dark Shadow Lord: Glowing, red eyes
- The Rat: Red pupil and iris.
- Lifty & Shifty: Beady pupils.
Mitten hands are hands that are mitten shaped in appearance (a thumb, and, where the fingers would be, is, essentially, an extension of one's hand). Lumpy, Handy, Lammy, and Mr. Pickels are the only main characters not to have mitten hands. Russell has one mitten hand because he has a hook on the other. It is unknown whether or not Handy had mitten-like hands before they were amputated, but very likely he did.
Characters' mitten hands often change to hands with fingers whenever characters grip something, gesture at something, experience extreme pain, etc. Though Flippy and Splendid had mitten hands in Happy Tree Friends, they don't in the Ka-Pow! series.
Split Lips and Triangular Frowns
Most of the characters have a line connecting their nose to their mouths. When a character frowns, the frown is triangular or carrot-shaped (^), with one half going off from that line. The only characters who lack this kind of trait are Lumpy, Sniffles, and Mr. Pickels. It is possible, but unknown, if The Mole and Cro-Marmot can make a triangular frown, as the former has the top of his turtleneck covering his mouth while the latter is frozen.
Most characters, have round ears at a certain angle on their head, roughly at right angles or 100 degrees from each other. The Mole has ears on top of his head instead of the sides. Lumpy, Russell, Flaky and Handy (except for two episodes) have no ears. Sniffles, Mime, Lifty, and Shifty have pointed ears and Cuddles has very long ears. In some cases, the characters have ear-holes that are another shade of their fur color.
Most characters wear shirts, pants, hats, footwear, or some form of apparel. This is a trait of every main character with the exception from Toothy, Flaky and Lifty (examples listed below). The same goes for many secondary and minor characters.
Some characters seem to wear clothes which are not visible because of their skin or fur. The most notable case is Lumpy, who appears shirtless in You're Bakin' Me Crazy and Let It Slide; the former depicts him ironing his blue shirt (see below). In I've Got You Under My Skin, he is shown taking things out of his pockets, indicating he wears pants. Other characters (such as Cuddles in In a Jam, Lifty and Shifty in Sea What I Found, and Nutty in Icy You) have also been seen with pockets. Considering his picket protector, it is possible to assume that Sniffles wears a shirt.
Most of all the HTF characters have an oval-shaped abdominal marking that is lighter than the character's real color. The only characters who do not have an oval marking are Lumpy, Sniffles, Cub, Disco Bear, Russell and Cro-Marmot. It is unknown if The Mole, Pop, Lammy, Truffles and Mime have one due to fact they wear shirts concealing the majority of each of their torsos (although Pop is not likely to have one because Cub doesn't.). Splendid's abdominal marking used to be straight at the bottom in the internet series, but it became curved in the TV series.
Face markings are different shaped markings on certain HTF characters' faces. The only seven characters who have a face marking are Tiger Soldiers, Cuddles, Giggles, Petunia, Nutty, Mime, Lifty, and Shifty. Cuddles and Mime have Rosy-red cheeks (although, Mime could be wearing makeup). Giggles and Nutty both have diamond shaped markings on their foreheads, while Petunia has an arrow shaped marking on her forehead which is connected to a triangle shaped marking on the back of her head. In all three cases, the color of these markings are lighter than the fur on the rest of their bodies. Lifty and Shifty, on the other hand, have darker mask-shaped markings around their eyes, to go along with the theme of their kleptomania (urge to steal). Tiger Solders have a sky blue giant vertical line marking on the between the eyes.
While many characters have fur, some also have hair on their heads. Disco Bear (having a big orange afro) and Cro-Marmot (with his bangs of brown hair) are the most noteworthy examples. Cub also grows hair in Snip Snip Hooray! and Easy Comb, Easy Go. Cuddles and Lammy have cotton-like hairs at the top of their heads which are identical to their cotton-like tails. Flaky has spiky hair with dandruff. Truffles has a curly hair on top of his head.
Facial hair is also common in some characters. Lifty, Shifty, Truffles, FatKat, Tiger General and the Tiger Soldiers have whisker-like tufts of hair growing from their cheeks. Russell has whiskers, though he also used to have a facial stubble in early episodes. Mr. Pickels has a curly mustache. Lumpy has a mustache and beard in Double Whammy part 1 and just a mustache in Pitchin' Impossible.
21 Characters have feet shaped like a boot. Russell, Char Sui, Truffles, Mr. Pickels, and the Ants all have no boot-shaped feet. Russell has two peg legs instead of boot-shaped feet, though it is unknown but very likely that he had boot-shaped feet like the others before he lost them.
Some Happy Tree Friends have tails, some have none, and all are different.
Panda Mom, Giggles' Mom, The Demon, Giggles, Pop, Cub, Flaky, The Mole, Cro-Marmot, Disco Bear, Lumpy and Flippy have no tails. Tiger General, Tiger Soldiers, Char Sui, Mouse Ka-Boom, and Sneaky are wearing pants, so it's possible that their tails are just hidden.
Cuddles and Lammy have cotton tails matching their hair. Toothy and Handy have broad, scaly flat tails. Russell's flat tail is noticeably smaller and probably furry. Sniffles, Prehistoric Sniffles, and The Rat have long pointed tails. Petunia, Nutty, Lifty, Shifty, and Splendid all have large bushy tails (the early version of Giggles also had a tail of this type). Mime has a small tail which disappeared in the TV series, but returned in mid-Internet Season 3.
Generic Body Shape
Most characters in HTF have a similar body shape (small plump body, with a large oval head). Lumpy is much taller and skinnier than the other characters and has a smaller, narrower, elongated head. Giggles' Mom is also taller, but she is less lanky than Lumpy and has an oval head. In Ka-Pow!, this is changed, and everyone is more unique.