I made a new banner for my Twitter profile! Finally XD
I'm not 100% satisfied but it will do for now. The drawings I used are:
my own character (who exists only in that drawing but I like her ^^)
Kage (from Rapture by Kameron Hurey)
Delenn (from Babylon 5)
I wanted it to be visible in my profile what kind of stuff I draw but I didn't want to just have a pinned tweet of some single drawing. So collage banners it is!