Leonardo didn't let you fight in the war. It didn't matter how skilled you were.

You were the youngest member of the resistance; Of course Leonardo would never let you fight or put you in harm's way, you were a baby in his eyes. But it was so unfair. Your brother Casey Jones got to fight and he wasnt that much older than you! You spent most of your time tending to the base, aiding whoever you could (mostly your uncle Donatello with his science experiments). But, you figured if you pestered your dad enough he would give in.

Speak of the devil, Leonardo just entered the base, looking worn down from training. You scampered right up to him, but before you could get a word out he intercepted you.

"No, kiddo. I am not letting you fight. You're too young and it's dangerous."