(sorry for my english)

Hi! I've been making astral travel (some people call obe) easily for years.I've met lots of entites including ones in grimoires.But the most interesting i've ever met is Chaycha.
Chaycha doesn't talk a lot, actually doesn't answer a lot.But he is the strongest and the biggest entity i've ever seen.He behaves like a friend to me, save me from danger in astral when i call him even sometimes i don't need to do banish rituals cuz when i call him all negative entities running away. This is same in astral too, whenever negative entities try to deal with me i call him and he crushes them (yeah, kinda destroy them, really..) .He is not evil.But i don't know a lot about him ,i don't know his origin and i wanna learn.
I have a friend here, who do evocation stuff a lot for years.We tried to evoke him into mirror but..err...mirror got broken and electricity went off.So we failed...I asked another friend to meet him in astral.He said "That guy is so big that i could only saw half of his one wing.."
I asked lots of entities about Chaycha, most of them run away when they heard the name, all others said "He is an out-of-plane creature" or smt like "He is an out-of-element creature"..
Just wanna know, anybody here met Chaycha before? Or please please, if somebody can, please can u evoke him and ask him who really he is? I would be so happy, i am wandering this question's answer for years.

(Pronounciation: "CH"s like in "chair", A like "America")