This character is an acquaintance of someone.

An acquaintance is usually considered as a friend, but sharing of emotional ties isn't present. An example would be a coworker with whom you enjoy eating lunch or having coffee, but would not look to for emotional support. Many "friends" that appear on social networking sites are generally acquaintances in real life.

This trait is intended to be used if a character knows another character from the same story, but the type of this relationship isn't easy to define by one of the child traits of this one. Otherwise use one of them or add a new appropriate one.