take a wild guess

also spamton + tenna + dess. amd gaster. and kris. and the weather duo. i could go on

heats flamesman

asriel/flowey, has some of the most defined and awesome lore

HEATS FLAMESMAN MENTIONED :fire: (pun intended)

the vessel, who im going to dress as on friday

does togore solo the knight?

Pulling a comically long list... (Tho i love everything (somehow) related with Jevil, that includes Seam, Tasque Manager, Ramb...)

As for undertale and lightners, it's Alphys. She's the correct answer.

nova u WOULD be an alphys fan. like i feel like i couldve guessed