Shiro Amada also counts in several occasions, given his compassionate personality & his devoted love to Aina.
Ensemble Darkhorse: Norris Packard is an honorable old soldier who is as loyal as he is awesome, and that's why we love him despite him getting relatively little screen time.
An even odder one: an unnamed Zeon woman who only appears to report on Norris' signal to launch the Kergeren. Her cute looks and being used as a Zeon operator in various games led to a fan following on 2chan who dubbed her Kergerenko which caused her to appear in MORE games and even as part of the promotional material for said games.
Fanfic Fuel: Ginias's lightly-touched Freudian Excuse and what little backstory was given for him and his sister are just enough to get fans' word processors put to use on occasion. The fact that some fans think Ginias might've been an abused child (extrapolated from the implications of their family being dysfunctional and the belief that his breakdown was fueled by deep-rooted trauma instead of purely biological factors) doesn't help. Needless to say, Ginias probably has the greatest risk of becoming a Draco in Leather Pants out of the cast.
Nightmare Fuel: Your Mech has been disabled and its sensors destroyed, leaving you trapped in the coffin-like cockpit, completely blind as to what's going on outside, while you are absolutely aware that the enemy ace is standing right there ready to kill you like he has the last three opponents he faced in the last ten minutes. Nothing happens. Cue minor Freak Out!.
And then there was the wonderful time where you bear witness to the gas attacks as seen in Gihrenís Greed. Made even worse if one actually knows what nerve gas does and realizes that scene is itself something of Gory Discretion Shot.