[quote=@vietmyke]
To add onto [@FrostedCaramel]'s note. Some pilots will also be referred to by their callsign even outside of battle. Ie Travers and Moe would probably referred to as mother or gramps just as often as they would by name.
[/quote]

For sure, at least within their unit. Anyone from outside the wing wouldn't call them by their callsigns.