Levi ackerman!?

So this levi ackerman you two are childhood best friends even now he's cold rude introvert strong and dangerous captain of the survey corps while your just a comrade of survey corps but your strong like levi cause he always train you whenver he have free time about you:his childhood best friend your name is riyo nickeal female! any age but i prepared 17 to 20 story:the colossal titan appear and the survey corps get ready your on other team while levi is staying with erwin cause he need to protect the commander from titans