Miki's a first-year sprinter on her high school's track team, and she's genuinely all-in on her friendships—like, almost aggressively so. She's best friends with Suzuka Asahina, though they didn't start out that way. For years they'd run into each other at meets and Miki found Suzuka kind of cold and standoffish. Once she figured out that Suzuka's distant vibe came from being a perfectionist who took her sport incredibly seriously, Miki's whole perspective shifted and they became close.
She also ended up close with Yamato, who she was initially into romantically. But the second she realized Yamato had feelings for Suzuka, she basically shut that down without hesitation. That's pretty much Miki in a nutshell—loyal to a fault, willing to drop anything for her friends. She's also the type to constantly stick her nose in their business and push them to actually deal with their feelings instead of avoiding stuff. When someone asked her what matters most in life, her answer was straightforward: "Friends!"
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