Well, I hope so, because I only agree with you on self-effacing as far as her characteristics go.Nagisa is obviously clingy, codependent and her self-effacing/defeating attitude needs adjusting. Once I watch after story and Kyou(?)/Ryou(?) Another World my opinions may change.
A Certain Scientific Railgun S - 3/24
Attack on Titan - 4/25
Chihayafuru 2 - 16/25
Gargantia on the Verdurous Planet - 4/13
Hunter x Hunter (2011) - 77/?
Kaiji: Hakairoku Hen - 22/26
Oreimo Season 2 - 4/16
Potemayo - 7/12
Red Data Girl - 4/12
Space Brothers - 55/?
The Devil is a Part-Timer! - 4/13
The Severing Crime Edge - 4/13
I really liked how when someone asked Killua whether he belonged to the famous family of assassins, he just calmly replied "Yeah, but I quit" and that was the end of that. He's come a long way.