Gaster: shoot! Frisk I'm leaving you here, I need to save your sister (leaves)
Frisk: but-

Frisk: (wispering so only gaster can hear) I don't think he's here
Gaster: by the way, steve knows about you cheating on him. I told him what you've done.

(Gaster is in hs room with a new trick up his sleeve... or at least under his coat)
Gaster: eyo, smurf! Bet you can't tentafrick me!

happy b-day
also rouxls, gaster ain't interested in you
he likes science
science respects him