Jace: His skills. His skills hardly ever fail him and when they do he has a back up plan.
Isabelle: Persuasion. She can persuade you into doing something with no magic required. Some don't like it but you do.
Hodge: He is strong. (Sorry don't have much for Hodge this time.)
Clary: That she got to live a mundane life. You are opposite from your brother Jace and sometimes wanted a mundane life.
Alec: Archery. Something you both love. Even though you are a mundane you still enjoyed a few archery classes.
Magnus: Magic. He can always surprise you with magic which you love.
Simon: His sarcasm. Sometimes it bugs you but most of the time when you are having a bad day his sarcasm makes you laugh.