What's A Hero? , Vigilante Izuku AU (Original writing)

Wolf Spiders are wild and crafty in their natural environments.
So when a vigilante of unknown age, origin and mindset is named after the little critter, what are Japan's heroes supposed to do?
A famous vigilante who is known for his personality, jumping skills and ability to remain under the radar has risen from the depths of All Might's shadow. One who has been active all across Japan; taking down villains, stopping robberies and much more. Surprisingly, the vigilante is a favourite among the people; not only does he fight crime, but he also stops suicides, bullying, domestic and public abuse, and many of the smaller, more alarming crimes that heroes fail to see.
The boy has shown his kind nature through stopping namecalling and quirk discrimination, and his cunning in the way he approaches heroes. His intelligence has shone through on his rescue missions and villain encounters.
He is well-liked by the public, affecting adults and children alike. The vigilant stayed to talk to the victims of mental illnesses, suicidal thoughts and those grieving losses. He was seen in clinics and orphanages numerous times and has earned the confidence of civilians. Some people thought him higher than heroes, even being defended by his supporters in a one-off clash with heroes.
It is fact that no-one could find the vigilante, but he whould find them. He wasn't any 'Symbol of Peace', but he could strike fear into villains like a kick to the face. And that's just how he fights. Surprise is a tool to be used without hesitation, with an unknown quirk, that's all he does. Be underestimated.

How will heroes arrest him when he's targeted by villains?

How will they catch him when some just want to protect him?

How about his ties with the students of Japan's most prestigious hero school?

What if this famous vigilante is just a sad and lonely Izuku Midoriya?

•WARNINGS!•
Dadzawa/Dadamada, blood, cursing, mature scenes, dark themes and violence around every corner...