As much as I love this series, I always feel Takezou kinda gets looked over in favor of developing the other characters. He's the one sore spot in an otherwise awesome character driven series.
Takezo already got his development early on.
Hes overcome his feelings of inferiority and lack of self confidence from failing to get into meiryoo.
And he's accepted his romantic feelings for Hiro, of course other characters who haven't been developed are gonna get priority spotlight because Takezo has already had his.
I like his role right now, he's helped Momoya quite a bit with his development.