Kyosuke can survive in a vacuum, has perhaps class 100 strength, by end of series his speed is perhaps lightspeed, and he can bend space to bind a target in a Cross formation like on a crucifix. He can heal quickly and regenerated a wing. He also grew more powerful the more his psyche was attacked to the point that psychological attacks weren't working on him anymore. He also survived a nuke-level blast from a satellite weapon in the 2nd episode while in human form, was blown out to sea, and swallowed by a blue whale. Came out unscathed.
The whole series starts with him getting stabbed through the heart, dropping through a skylight and getting caught on a rope, hanging upside down til he 'died'. Was buried, then dug up days later, still alive.