Wight is literally and figuratively the best character and arguably the most fleshed-out (heh) out of all of them.
The guy has shown pride, humility, humbleness, genuine love and conflict resolution that doesn't hinge on him getting OP's attention.
The author already denied him a spot in the main party for the crime of (1) not having tits and (2) not being cover-art harembait.
If the Mangaka kills off Wight for the crime of being literally a better character than the MC and his harem combined I'm literally going to go read something else.