Aljahar

Six-armed catacomb ghostie boy with a penchant for manifestation.

Description
Six arms, possibly more. Seems see-through but is not technically a ghost, though ghost-like things flow through him.

Background
Aljahar has been down in the catacombs below Csipherus so long that he doesn't even know that there's a city above him or what problems it faces. So little is known, but also like, that's pretty telling.

"It's Haunting, How I Can't Seem to Find Myself Again" (1x57)
The party first encountered Aljahar (then unnamed) as the source (or sink, hard to say) of all the ghost-like things in one of the tunnels they were heading down. Harry was the first to see him and interact with him and his many, many arms. A negotiation seemed imminent.

"Take Me Home, I'm Learning to Live With Ghosts" (1x58)
The negotiation produced mixed results: Harry, Helli, and Zeno managed to resist being pulled into Aljahar's manifestation dream worlds while the rest of the party didn't. Thanks to Zeno's countercharm, everyone got out okay. Harry continued to find out more about Aljahar, including his name and his total lack of understanding that he was anywhere near a ton of dead bodies. Deciding that probably all this was harmless, the party bid Aljahar all the best, saying they might return in the future, and continued on through the catacombs.

Relationships
Honestly, at a loss here