I have ths group over here! First, two that will know him are Alicia Spinnet because she's been there since people started showing up so she'd have talked to him when he arrived in October, happy to figure out how that went or how they got along! Second is Cat Chandler who is a Detective so they'll be working together for sure in the future and it'll be fun to see how that goes!
For my other characters, I could see Lissa getting along with him pretty well, but she gets along with a lot of people pretty easily. She's very diplomatic. Becker is also on the same floor as Ed so it is safe to say that they'll run into each other and could chat from that! Davina's one that is very wary of people but I'd happily see what happens in a room together! And Malcolm is my goofy one that'll probably make bad lawyer jokes at some point...