Parameters are too damn high on that assassin, but I don't dislike the concept.
[hider=My Opinion][center][b]Note that these are all balance related, rather than things relating to the character concept.[/b][/center]

Luck doesn't need to be that high. He isn't a freaking leprechaun.
B+ rank for his noble phantasm isn't explained, B rank makes more sense unless you are able to present sound reasoning.
I don't see any reasoning for C+ in END, unless you can present such reasoning it should be reduced to C.
Agility is rather high, but within logical limitations.[/hider]