Sachika is extremely positive, sweet, and outgoing... but also gullible, naive, and not very observant. That's why she's almost never seen apart from her twin sister, Saemi, who seems to make most of Sachika's decisions for her. She spends a lot of time apologizing on Saemi's behalf in order to keep the peace. Sachika is easily shaken up by conflict and wants nothing more than for everyone to just get along for once.