Sachiko Saeki’s the youngest in the cast, which is veeery apparent. She didn’t meet the age requirement, but managed to persuade her older brother, Tetsuya, to ask if she could come with him. She loves her brother more than anything in the world! Given that she isn’t the most mature mentally compared to the others in the cast, she still tries to fit in. She knows it’s hard, especially when she doesn’t know what to talk about other than flowers, her day, and Tetsuya. She can be a little bash at times, and really cooperative at others. She cares about everyone in the cast, despite being intimidated by everyone, but she cares about her brother the most. As long as you leave her brother alone, Sachiko will be your best friend! 

Sachiko’s the youngest in the cast, so she definitely will sound more childish. Not like a little kid, but still a higher pitched voice that’s a little annoying and whiny, but also sweet and naïve.