Serendipity Studio's Danganronpa Character Casting
Kanadia413 for Sakura Ogami
From Danganronpa: Trigger Happy Havoc
A fierce, THICC, warrior woman who walks around in a maiden's sailor outfit. Don't let her muscles fool you, she is a sweetheart, doesn't decide on violence on anyone out of nowhere just for the sake of it. Her voice being a bit of a suffocating male teenager though. Ultimate Martial Artist
"Muscular quality and quantity is right around that of an extremely ordinary high school student... Hmph. What a shame. You're not at all fit to act as my training partner."
"But I'm not upset by what I saw. If you're overpowered, you must accept your death. That is the only way of my family. But still...I refuse to believe they would lose so easily. How...?"
"Friendship between men seems very...simplistic. Nothing like what I'm used to with girls."
I can see the route you were going for with the "mature female samurai" kind of vibe, but its not completely sakura. maybe you could try to listen to her voice through youtube to get a grasp on how she sounds?