Learn about the next newest Hero "Hana" in ch13 of the GN

[Avalanche]

It's a very powerful power (maybe too powerful to be plausible), yet it's also a very lame one at the same time.

It's not overly powerful. It appears to have proximity constraints, which was what got Hana into trouble in the final third chapter.

No doubt Hana's martial arts abilities will make up for the fact she has a passive power.