Friend

A friend is someone else who you have a positive relationship with. This positive relationship might not go the other way.

Agents somehow manage to strike up friendships between each other, despite there generally not being too much time for them to socialize.

When an original character randomly becomes friends with a canon character, or two canon characters that are normally hostile or apathetic to each other are suddenly friends, it is a charge.

"Friendly" is also a good word to describe the PPC Boarders (if the person communicating with them is likewise).