Soap - Ghost introduced him to you.
Ghost - Shepard put you two together for a mission.
Yuri - You showed him around when he joined the task force.
Price - He was your Captain.
Makarov - When you joined the ulternationalionists he was the first person you met.
Roach - You were in training together.
Sandman - Captain Price introduced him to you.
Mason - Woods put you two together for a mission.
Woods - He was your Sergeant.
Section - You were new,he showed you around.
Harper - Section introduced you two.
Logan - He was close to your age so you talked to him.
Hesh - He trained you.
Rorke - In the ghosts with until you both left.
Elias - He trained you.
Gideon - You and Mitchell were new so he showed both of you around.
Mitchell - At Will's funeral.