Can Riku sense what your character truly is?
- I'm not sure exactly how to go about answering this for a Jedi. But as you know obviously about the Force being a part of everything and being light and dark, yada yada~ I'll leave it to you decide how to sense this.

- TL;DR answer? Yes.

If so, what are they and can he tell just by a passing 'glance'?
- What ever your little heart desires likely about the fact he's a BAMF XD~ But yeah, I'm not sure how Riku would know about Jedi or what not, so I'll leave it to your judgement on the matter.

What level of "darkness" do they have within them?
- I won't deny the man has come rather close to the dark once, but he kept from falling to it. So likely pretty much, he's likely going to be rather "light" to Riku's senses I wager.

What do they smell like?
- The fabric of his tunic and robe likely is it.

What is your character's tolerance to dark magic?
- I'm not sure, possibly average? No strength nor weakness against it.

Can he break privacy laws and just teleport to where your character is?
- By all means certainly, though he might not appreciate it at certain times.

Can he go Ansem on your ass transform into "Ansem" on them?
- I doubt the opportunity or necessity will arise, but if it does~ Sure.