Well, I've spoken with everyone. Could develop more with some people, but I have got some basic ideas here. Will just write a small summary of Calvin's opinion on them.
Adelie
Reliant on her consistency in some ways. Differs greatly in decision making, but considers her views often. (Pulled her out of the lake, became friends soon after.)
Rin
Values her opinion. Relies on her calmness in stressful situations. Someone who helps him relax. (No complex history, met in a class once and just got on well. Mutual friend with Adelie.)
Stella
Appreciates her friendliness. Respects her resilience in arguments and ability to turn the other cheek. (Met when they were paired together on a Care for Magical Creatures project.)
Zef
Relates as a male. Finds it easy to speak open to him as they've both spoken about their pasts together whilst he rarely speaks of his childhood with others. (Possibly met in DAtDA during Boggart lessons. Saw that they were similar in many ways.)
Hard to write a big chunk of text for this sort of thing in this context, just wanted to give people a loose idea of Calvin's opinion on everyone. Individually, you all know in more detail what his thoughts are.
I don't know when you guys want to head to IC but I'm okay for whenever.