Appearance and Personality
In it's original form it wore clothing similar to that of Johnny Joestar. Tusk seems to always be evolving much like Echoes from Diamonds is Unbreakable. Its appearance has change little by little.
Powers (First Form)
In his first form, Tusk gives johnny the ability to "spin" his fingernails at high speeds and use them as projectiles.
Powers (Second Form)
Once Johnny learns to spin the fingernails with aureal rotation, thus bringing Tusk to his second form, he can make the holes he produces move: if for example he shoots and produces a hole on a table, he can move the hole on the surface of the table and whatever touches the table's surface. The hole however leaves a track behind it.
==Powers (Third Form)
During the fight against the stand Civil War, Johnny, in a moment of deep crisis, sees Jesus, who gives him the hint that leads him to discover the third form of Tusk. By shooting himself with a fingernail spinnig with aureal rotation, he's able to send part of his body through the hole, moving them away from his body: this way he can shoot fingernails from different directions, sending his hands or fingers through the holes.
Once Johnny shoots a fingernail, it grows back extremely fast, except when he shoots it with aureal rotation. In this case the fingernail takes several minutes to grow back: however, Johnny discovers that by munching herbes or drinking tea he can accelerate the growing process.