Since Laios apparently hasn't had the time to judge you yet, i'll give you some feedback in the meanwhile.
Kitsune seems too powerful compared to our characters. All his powers are reasonable in themselves, but he has tons of different things going for him and very little weaknesses. He's both stronger and way faster than any of our characters, more durable by virtue of iron tails ánd has a bunch of really good offensive and utility spells. His only stated weaknesses are situational ones that you'd have to know about to utilize, and especially silver is unlikely to come up at any point in this rp.
That being said, there isn't an established power level barrier that i know of, so maybe Laios will allow him in at the later stages when the bosses' powerlevels are way higher. But at this stage, he could probably defeat any of the demons by himself.