Possible Clues:

• Another one who is in form given marks?
• *Yearbook signer
• High-quality end to game -- it's the fellow in form
• Yearbook signer, often
• Damon, to Affleck, in the '80s
• With whom one shares history, say
• Charlie supported by female assistant, a chum from school
• Cold girl getting degree, the heartless student you study with
• Peer