User blog comment:B214/Volume 21 info & spoilers/@comment-27654795-20160401044634/@comment-28087290-20160402052255

Yasaka - Just think Kunou with a taller body and big tits

Titamat - Probably similar to Gabriel albeit with better beautiful blue hair

Crom Crauch - Maybe Similar to Sebastian from Black Butler

Apophis - Wears a suit like Arthur's with hair like Rin's hairstyle from Free

Sun Wukong - Just imagine Sairaorg's mane from his BB as Bikou's hair with a tied beard and the face is wrinkled and he wears the same armour but with traditional things Buddhists wear.

Yu-Long - I've always imagined him looking like Shenlong from Dragon Ball