First off you nailed paraphrasing that,second I'll explain things more

Surname/dynasty:I am not to familiar with what either of those are

He can turn invisible as long as we wants

Those aren't katars,they are claws,If the weapon in the picture is a katar,oops

Shadowlegs are pitch black spiders who make literally no noise,their steps are mute

It was crossed by unknown means,even he dosent know

He isn't sadistic,he just seems that way I guess,I don't know what I'm trying to say

As for sides,at the start he will be nuetral I may change this,to which side,I have no clue

Evil gaze isn't hypnotic,it is used to paralyze targets,and then make them fall into a deep sleep

Dark spawn look like solid dark purple figures with no physical details,they can be of any shape or size but all have claws that could cut steel

Weak points in his personality?i am not quite sure what you mean by this

Anything else you're not to sure of,lemme know and also the way you formatted his CS looks cool, you get a cookie :3