Jio 4 years later, two levels down?
Yeah, two levels down!
1.He can't change to Satan, (i won't mention the full form)or he lost control.[unlike Cross]
2.New Shin is Useless when his fighting Angels, and those without hatred in hearts.[unlike Cross, his Rings shines as always:)]
So there is a question, did he become..well a bit weak?
As i mentioned above, Cross, well even Ruby-chan is now two levels above him.
Wath do you think, folks?
Jio's power is incomprehencible.
In short Jio is currently more powerfull then anyone. He just doesn't know it yet. To his left hand he still has the aura sucker from satan, and now on his right he has the O-part that is ranked S, and has over 100 effects, some of which aren't even known. We do know however that it can send messages and do a big-bada-boom. Read book 3 about ruby's pendant, and then just before rockbird falls for how he gets it. 2-3 levels lower? Hah! Jio doesn't want power now, he wants peace. He wants his freinds, and he wants to be left alone with them.
In short Jio is struggling with himself, not to rule the world anymore, but to find his place in it. Now that Ball & co. found him it's back to the front to save people. In a way I see that instead of growing weaker, he has done something far better. Grown as a person.