You & muffet & asgore: drinking tea

Monster kid & temmie: playing Pokémon

Chara: whispers to frisk "cmon!! Just take the knife and start stabbing!"

Frisk: "no 😑"

Asriel: eating food

Gaster & alphys: discussing something

Toriel: baking a cheesecake pie in your kitchen

Flowey: in his pot thinking of a way to kill everyone (but he can't)

Sans: laying on the couch being lazy

Papyrus & undyne: doing the "training" in the kitchen

Mettaton ex & Napstablook: vibing