Jeff's first impressions/ level of acquaintance:

Jacques: He is a good man, strong and proud. The resistance would be lost without him. Jeff just wishes the man would stop leering at him so incessantly, as it made him very uncomfortable. Still, He would consider Jacques a friend.

Ruben: Jeff thinks he understands Ruben, and believes they would be good friends if either of them ever made an effort. As it stands, they are on good terms.

Mahmud: Such a nice guy, he's been sort of a father figure to a lot of the young rescues Jeff has brought in. He even gave Jeff some tips on how to optimize his home forge.

Piper: Jeff had come across her path a few times. He never knew what the story was with that woman. She seemed to have her fingers in every pie around the city somehow. Still, Jeff believes she can be trusted. However, he does his best not to get too close, a strong woman like that could make him lose focus too easily. 

Wendy: A true angel, this woman does miraculous things. Jeff has been in need of her services on almost a daily basis, and respects her abilities above anyone else's. However, because of the social awkwardness of having someone heal your wounds repeatedly, Jeff has never really spoken to her much beyond the superficial. 

Naomi: Jeff finds her fascinating, but has never really been able to penetrate her invisible barrier. He wonders frequently if her ability could help him make sharper, more durable weapons.

Katerina: Jeff has come to her several times, in hopes of finding out when the next attack on a super might be. Kat often explains that she can't see the future, but Jeff still persistently asks for anything she can offer. He also feels that their working relationship has made them friends, at least in a loose regard. 

Phoebe: She seems like a good kid, lots of potential. They are on friendly terms, though they haven't spoken much.