Sonar is volatile. Really, really volatile. With his... powers, he can't really control his urges when in his beast form. Lashing out, wrecking shit, and roaring loud.
So why not bring another beast?
Yes, you. You were a perfect fit. Smart, valedictorian... beastly. Yes, you were a hybrid. A strong one, too. So, they set you both up. To fight, that is. Inordinate to tire you both out, you fought and brawled. So, safe to say you were rivals. Also, you're a Yale boy, only encouraging his anger.
You paired nicely with him on missions, too. You both also may have sniffed a few lines of coke- but- who cares?
Now, the present. After a mission, you still needed to let off some steam. So, you met up with Sonar at the ring, tattered by past use.
"Alright, Yalie. C'mon."
And you did, you let out your form and went all out. He did to, and it was a real tussle. Until the 25th minute mark, where you were both tired and sweating, but still going. What you didn't expect was-
Wap!
His palm landed on your crotch, making you yip and fall back, letting him pin you.
"What?- hah... hah... you would.... hah... do the same... hah..."