Alicornutopia

Aral is, obviously, covered, but we're going to introduce Ekaterin a bit early and she needs a screenname too.

And I need a Bel Thorne and (less urgently, since I don't have a face for her) a Nicol.

Do you still need usernames for the Joker, Sherlock, and Joker-Sherlock? also, do they need to be related (like kingfishers and raynes or the gemini twins?) (I don't have any ideas yet, but I might have time to look for them soon if you still need them)
also are there any unusual guidelines you'd like to be used for the usernames?

I do still need usernames for them. They don't especially need to be related, but it's definitely a bonus if they are. I don't have any unusual guidelines in particular.

Perhaps something could be done with "you see but you do not observe"? Jokers seem fond of sensations.

For the Sherlock, maybe all_that_remains, a_wonderful_companion, strangerdepths,
Unsplit: mark_my_word, doubletake,
set: got_his_eyes/same_exact_smile/all_he_has (Sherlock/Joker/Unsplit) (or a variation of these) from Replicant by TMBG
seethroughyou/feeltheburn/inthemirror (same order maybe) from see me in the mirror by alice cooper, which maybe has other possible usernames but I can't look now, sorry I just want to submit this now
EDIT: fixed typo

Ooh. You have interesting timing, BlueSkySprite XD

I just finished creating a trio of journals for the JokerSherlock set: unmirrored (Joker), unmired (Sherlock), unmarred (mixed).

I like some of your notions, but I think ultimately I am happy with the trio I used. I might save up seethroughyou/feeltheburn/inthemirror for if something ever possesses me to make another set XD (feeltheburn is taken, but the set might still be salvageable if I can find a good replacement or tweak for that one) (edit: feeltherush isn't taken, and I am now quite tempted to grab the trio just to sit on them, in the knowledge that I am almost certainly going to want them one day)

(second edit: I think I'm going to go to bed, and tomorrow if seethroughyou/feeltherush/inthemirror are still all available, I am taking them and sitting on them for future JokerSherlockTrio needs.)

I know next-to-nothing about the JokerSherlock because I have been avoiding spoilers so hard, but I have picked up that apparently they are a clone of Miles? In which case, since Miles is presumably XY, maybe one JokerSherlock nameset could be for an XY clone and the other could be an XX clone?

Ooops timing! =)
Eeee yay! The ones you chose are really cool together!
Also, I see you snagged the seethrough/... set! Yay! Now I feel useful! =D

I was listening to some songs and noticed that some of the lyrics seemed like they'd make good paired screennames
They don't seem to fit any of the things you're asking for, but I thought I'd post them while I remembered them in case they were useful for anything. (Sorry for the double post)

from Flying Prohibited, Romantically Apocalyptic:
a possible drawing/scheming related trio: guiding_lines/drawn_along/by_design
possible flight related pairs: theneedtofly/abovethesky; thosewithfeathers/intheheavens

from Pretty Little Head, Eliza Rickman: it seemed like all_my_love would be a fitting name for a Chelsea maybe?