For Barnabas: I volunteer my own Barnabas as tribute. He hates ghosts but he would make for a fun person to haunt. He's also got Elsie trying to reform him, so maybe ghost Barnabas has decided to 'assist'? Or just offer commentary.

For Effie: We've already chatted about my own Effie. xD (I'm not matching my characters up with yours because they have the same name, I swear!)

For Endymion: Once he gets accepted, Ahn-Bo Jeong deals with cursed objects, so they could always be going after the same one? Except Ahn-Bo's isn't above board. xD

For Matilda: Not what you asked for but I think she and Poppy MacFusty would know each other. Both live in Irvingly and both have families involved with dragons.

For Tess: Effie May Woodcroft is heavily involved in the feminist community, I'm sure they'd know each other pretty well. Friends, even?

For Tybalt: I mean... Barney is becoming Elsie's pet project. So there's that lol