Well, Silent protagonist != no personality, silent character. It was heavily implied that Minato was practically mute (given statements from Mitsuru and Shinjirou who flat out say he doesn't say much and is nigh-unreadable) and that was reflected in his design. FeMC seems to be more emotional and talkative just from design alone.
JyanpeYukappeAnd neither am I!!!Hiko Hikodere dere dere dere'tackle'ahe!'stomach growling'main character:Shizuki->Shizu-chanAh- Well in that case you don't need my support right?uuh, what about Tartarus?No way!!!In that case I won't go either!! I'm staying with leader!!Then I'm not going either!!!returned'glomp'Then I'll be on my own! I'll be lonely!!! I'm not going either!!FuukanAi-tanPersonaYukaricchi, how bout you stay behind this time?I'll die from loneliness!Don't wanna drag you guys down.Hmm...I wonder if that's for the best?If I'm separated from Yukari then I'm not going!!!Our battle strength is too low!!front entranceThat particular area has nothing but enemies that cast Zio, right?kya!MittsunIkutsukkiiYou guys sure do get along well.'gloom'Cause I'm starving!!'blink'