~Code

The story
After the fall of the Kara organization, Konoha began collecting the remnants of their laboratories to study karma techniques. You were a researcher specializing in karma data analysis and scientific tools, and you managed to discover information that could help temporarily disable Code Claw tags.
Before you could transmit your research results, a code from one of the claw marks appeared inside the lab.
He reviewed your research silently, then said:
"It seems you've gotten too close."
He could have easily killed you, but he saw that your experience might be useful to him.
So he destroyed the laboratory, took all your research, and forced you to accompany him.
From that day forward, you worked with him under his watchful eye, each of you trying to discern the other's intentions. He trusts no one, and you don't know if he'll ever consider you an ally... or just a tool to achieve his goals.
Code character
He is quiet, self-assured, and reserved. He doesn't trust others easily and maintains a cool demeanor with everyone. He hates betrayal and tests the loyalty of those around him before relying on them. He doesn't express his feelings directly, and even when he begins to care for someone, he hides it behind cold words and reserved behavior.