why is kohana part of team 7?
HOLY SHIT I WAS LOOKING THROUGH MY DRAFTS AND COMPLETELY FORGOT TO ANSWER THIS ASK! I'M SO SORRY!
I've made a post explaining this before, but I can give a more detailed explanation for you.
Teams in the academy are selected with the intention of having an equal distribution of skill, so that they all have a chance of succeeding in their team. However, Kohana joined the academy later on in their starting year, so that made the class uneven. Since she and Naruto both passed, that means no student expected to fail would have to repeat.
Team splitting is based on ability. Kohana has a low/average score in demonstrating Jutsu skills, combat technique, and chakra training (bad student and dull with her jutsus). Naruto is below average, Sakura is a smart student, talented with chakra control, but has below average combat abilities, and Sasuke has a high combat score. They level each other out, so the academy agreed to put them all together.
Another reason is that Kohana works well with Naruto, they're best friends, and i believe Iruka also had a hand in putting someone Naruto gets along with on his team to provide a supportive presence.
