Zecharias does have a true form, and I drew what would be close to his true form recently, just for fun:

This isn't what he really looks like, but it's close. ^^ I hope to be able to put his full form in one of the games one day.

Also, here's a reminder to follow my game Tumblr and Twitter to see updates on my games ^^

Tumblr: https://letmeremindyouvn.tumblr.com/

Twitter: https://twitter.com/LetMeRemind_VN