They are NOT 'small trolloid mannequins for emulating social bonding rituals and pre-enacting adult life', they are ACTION FIGURES.

CG: DID YOU SEE ANYTHING? TG: its cool i didnt see you playing with your dolls again

Karkat was playing with Gamzee and Terezi dolls when suddenly, Dave walks into the room.

dave walks in on karkat playing with dolls!

dave walks in on karkat playing with dolls

Dave happens upon Karkat's voodoo ritual.

Dave is a creep

dave isnt allowed in the rosemary sleepover

Kanaya and Rose have locked themselves in a room. Dave is suspicious.