Aihana Etsu (Learning Core)

Aihana Etsu is a boy who claims to be the #6 Level 5. However, according to Shokuhou Misaki, a Level 5, he is only acting and is not the real #6. It is currently unknown whether "Aihana Etsu" is his real name or if it is supposed to be the real name of the #6.

Appearance
The only known details are that he is a slender boy who wears a black leather jacket.

Agitate Halation Project Arc
He is first seen at Learning Core, presumably drawn to it as one of the 'heroes' of the Agitate Halation Project, fighting the other 'heroes'. Despite supposedly being the #6 Level 5, he effortlessly defeats people without using any powers. This causes many of them to flee and pursue another target.

While watching this battle from the side, Shokuhou Misaki comments that he only used his acting skills to play the role of the #6 and that as a fake Level 5, she has no connection with him.

Abilities
His Esper abilities are unknown (if they even exist), however he is proficient enough in melee combat to completely overwhelm several dozens boys and girls - many of which are probably Espers and are described as 'heroes' - while completely unarmed and without using any Esper power. He also did not receive even a scratch while fighting them. His arms are described as "firing punches on the level of heavy machinery", and one hit can cause several boys to collapse.

He also apparently has acting skills on a good enough level to convince people he is the #6 Level 5 despite not using any Esper abilities, as Misaki claims he is not the real one.

Quotes

 * (To his opponents:) “My name is not ‘Academy City’s #6’. Nor is it ‘One of the seven Level 5s’. My name is Aihana Etsu!!”