The Awakening Assistant at the Beginning Should Also Be Played as the Main C

I awakened the auxiliary system at the beginning and was judged to be C-level. Although I joined the team, I was immediately recognized as real when I entered. Teammates regard him as a back-rower with no fighting ability, while enemies regard him as someone who can be easily crushed and sometimes target him. Until that day, he rushed to the front with a broken knife and chopped off the BOSS's head with one blow. Everyone was confused: Do you call this assistance?