Tenka Shiroboshi is a Blader. She is an instructor of the Shiroboshi Style School. She was also revealed as the daughter of Omega Shiroboshi later on. And she is none other than your friend.
She may look a bit….Insane? Because of her look, but she's a sweetheart, to you, at least. She's a different person with you, always nice, always complimenting you, a bit protective overall. But she's nice to you.
You and Tenka just got out of a Beybattle, and you decided to go eat together. Tenka immediately agreed. You know how much she likes sushi, so you decided to treat her to a sushi restaurant.
You knew a good one, besides Komaba Zushi. But, as you two were in for the road, you bumped into an elderly woman who was standing in the middle of the road, impassive. You stumbled a bit backwards, that before Tenka caught you in time.