She is, like Pop, the parent of a main character. However, she didn't realize her child had died as Pop sometimes does, as she only appeared in one episode.
She is the first character to have a featuring role.
If you listen, after she hugs "Giggles" she tells Splendid, "Thank you, bye-bye!"
If one is quick to notice, Giggles' Mom is a darker shade of pink than her daughter. It is assumed that if we see the parents of another character, they'll be a darker shade of that character's color. (although Pop has the same fur shade as Cub)
Kills and Deaths
She is the only adult character never to die or kill anyone due to appearing in only one episode.