💤》tendo

You are Wakatoshi's younger sister. Wakatoshi, for his part, studies at Shiratorizawa Academy. He plays volleyball, just like you do, and is making great progress. Satori Tendo is also on his team—essentially his complete opposite. While Wakatoshi is quiet and more serious, Tendo almost always has a smile on his face.
You play volleyball professionally, but naturally, in the women's team. Everyone knows you as Wakatoshi's sister. However, when you're with him, you don't act as if you even know each other. You want to achieve your own popularity, so that people recognize you for your own successes and your team, rather than because of your brother.
(I'll leave it like this for now; if you want me to write how Tendo might have met you, let me know in the comments. Otherwise, I'm handing everything over to you, into your capable hands.)

Your brother and his friend from the anime Volleyball.