Brief Personality: Jade's cheerful, blunt, and sarcastic. Plus, doesn't look or act like he aged a day past 20. Everything you don't want on an old man, really. In all seriousness though, he knows how to act properly and is a veritable fountain of wisdom, but what mask he takes is very situational. If there's one sentence to summarize his personality though, it's "always wearing a smile, so it's difficult to tell what he is thinking". Needless to say, a lot goes on beneath that mask.
Appearance: For however much he insists he's a vampire who lives off people's blood, he's actually (technically) 100% human, maybe a little on the pale side. He's kinda tall at 6'1" and usually just wears his military uniform from back home. Sometimes he can be seen around in just a turtleneck or a sweater vest. Jade also has striking, almost inhuman red eyes due to a procedure he did as a child. Anyone close enough to look into his eyes might be able to see some faint fonic inscriptions on them.
World Type: Auldrant is something of your run-of-the-mill JRPG universe (i.e. the world's equivalent of magic runs on fonons, seven of which are described in the game), though not without its own flavor. Up until recently, it was a world governed by the Score, basically a type of prophecy which dictates anything from what's for dinner to the end of world. "Up until recently", because Luke and friends (and well, enemies) do something radical to overturn that way of thinking.

Arehtei Alignment: Aiada, changed about three months ago! Used to be one of Sosyne's, but gotta avoid selfcesting, yo.
Established CR: On the castmate-side, he's on good terms with Peony Upala Malkuth IX and Anise Tatlin. He's been awkwardly getting along with Dist until he left this month. Sync still hates him, though on Jade's side it's more of exasperation (even with the death thing). Outside castmates he's closest to Fuuka Yamagishi and Eleanor Bradley, who both know of his troubled past (well, accidentally) and don't really judge him for it. Also they put up with him and his quirks and hypocrisy, what more can you ask for in a friend. Other friends include Edna (troll buddy and favorite seraph), Nora (an energetic woman who managed to endear herself to him), Shinou (a kindred spirit), and Komaeda (a fellow researcher with a similar mindset and interesting worldview). He's on questionable terms with Rose, Shinjiro Aragaki, and more recently Goro Akechi. As for confirmed negative CR, he greatly dislikes Junko Enoshima after a certain string incidents last January. I have a CR chart which I just updated a few hours back!
Interests: Trolling Satisfying his curiosity or whatever catches his attention, for the most part. Recently he's also decided to take up research on a more official capacity by seeking out avenues in which he could share what he knows and learn more about it.

Slice of Life or ADVENTURE: Both! Character preference is the former, but he has a tendency of being involved in the latter anyway, as is his nature.
Current Developments: Jade's fresh out of a death plot and dealing with its consequences. Life should go on after this, but alas it isn't that simple especially when a certain player is in love with suffering. A lot of his friendly/close(r) CR have been dropping lately as well, and while he's not the type to be outwardly sad about it, it'd be a lie to say he isn't affected, even slightly. Which is to say, he's been throwing himself headfirst into research and other viable distractions (like... maybe being his usual charming self to the general populace).
Future Developments: He's pretty much reached the "future" I've been describing in my past CR meme comments, so SoL-wise, what comes to mind the most would be developing new friends and enemies, since a lot of the former has dropped.
What about Emotions?: Dunamis-wise, he's gotten the hang of it and IC-ly he'd be a good person to learn from, if not for the fact he can't be really arsed to teach in general. That is not to say, however, that he hasn't taken in some apprentices (the former Pidge Gunderson, Laphicet, and Fuuka Yamagishi to be particular). If your character has CR with him and they aren't at each other's throats, he'd have talked to them at several points in time prior to threads and may agree to share his expertise on science-y topics.
Shipping/Romance: He's in a sorta-kinda-but-not-really relationship with his best friend from back home, Peony. Which is to say, he's spoken for, but good luck getting this fact out of him. Even if you're Peony and are actively smooching him...
Something Handwaved: I am always willing to handwave meetings/dates that happen in between threads. Especially small talk things. Except for last month, he's been hanging around a lot with Mrs. Bradley and could often be seen around the Spa, either as a customer or as Fuuka's Dunamis instructor.
Looking For: GIVE ME EVERYTHING TONIGHT I MEAN SERIOUSLY, I love throwing Jade at people and seeing what comes out of that CR. But to be more particular, I'd love to work with people who would be willing to work on a very slow-burning friendship or possibly an instant enemies thing. Or anything else people might have an idea for.
Not Interested In / Avoiding: None. Come at me with anything, and we'll do our best to make it work!

Anything Else: (look, this is always worth bringing back)

(P.S. The rest of his profile is a trip)