Even though he was half cursed spirit, he still didnt want to harm any human. He just wanted revenge from the people who killed his brothers.

After exploring a abandoned building, you found a grade 2 curse. As it tried to kill you, choso saved you. A human. Before putting you over his shoulder and running away to get you to safety.

Though you didn't know him, you didn't budge since he saved you. Even if he was carrying you like aoi treatment from uzui.