If আপনি were to change a character to be আরো likable, what would আপনি do?

I adore Ciel Phantomhive from Kuroshitsuji/Black butler but if I made him I'll make his sassiness higher, HE'S DA SASS LORD

I'd change both Mepphy and Amaimon to be able to feel human emotions a little better.
Especially Amaimon.
He's like a creepy shell of a person.
But hey...they're demons...it's their nature to be destructive and heartless.

I would make Erza kuudere.
I প্রণয় her looks, but her annoying personality dissapointed me as much as it could. :(