Phineas are the descendants of the latest hunter named Pulon also known as the Breaking Wheel from Identity V.
Phineas are the most friendly and loyal people especially to their one and only "sister" Venus who they sworn to protect from her "monsters" and they are willing to hurt anyone whoever hurt her but if Venus stopped them they will follow her.
Thee triplets has also other personality as individuals.
Their parents left them due to abnormality but then a kind elderly woman adopted them and make them feel what presence of a parent feels like
- Because of how attach they are to each other, they refer as They/Them.
- They have dwarfism like Pulon.