Nami

Using the blood of someone or something else, he can transform into a shark humanoid that stands at 8 feet tall and has greater strength and speed. In his early years he tries not to dip too much into this form as it takes several hours to wear off.

Without using his ability blood frenzy, Nami has a bite force of about 1000 psi. In his first level form he has a bite force of about 3000 psi.

His quirk/mutation gives him attributes similar to that of a tiger shark which include: dark vertical stripes on his shoulders, back and thighs, shark serated teeth that easily replace themselves if lost, great eyesight in dim lighting, thick sandpaper like skin, and gills that allow him to breathe underwater,

A third form, a 'move' named Elasmecho (Elasmo in partial to the shark's scientific name, and Echo due to a sub ability), only acitivates under specific conditions. Specifically when Nami has injested a mix of another's blood, his own and suffers an increase of CO2 in his blood is when this third form activates. It seldom happens unless it's a crisis. In this form, Nami lacks more advanced thought and acts more animal like, but he does recognize his own teammates and friends and therefore doesn't attack them.