(Minor Side Characters) Monster and Goner Kids

Oh hey, it's these two arm-less rascals. I guess they're siblings or something?

Monster Kid
Traits: Brave, Childish, Clumsy, Friendly
Favorites: Geek Rock, Cheesesteak, Yellow
Zodiac: Pisces
Fun Fact: Probably dating Frisk

Goner Kid
Traits: Grumpy, Mean-Spirited, No Sense of Humor
Favorites: Dark Wave, Cheesesteak, Black
Zodiac: Libra
Fun Fact: Might've met Gaster at some point and got very depressed by his state of non-existence