https://www.youtube.com/watch?v=-Tdu4uKSZ3M

In actuality Louse is the main representative for characters who learned how to manipulate their bodies to use seemingly magical abilities.
He can move all the furs on his arms and hands and move them at high speeds to rapidly build up static that he can then release as a lightning bolt
and has modified his claws so the nail's are the equivalent of flint and steel producing a flame spark, and releasing it in the form of a fireball.
he needs to make sure to quickly release the attack otherwise it will damage him.

and other fun fact, In True Jojo fashion, he was an enemy they defeat before eventually becoming an ally, And he injured Aquata in the fight, this is why to this day she hates his guts (And told everyone not to fuck him)