Why does alucard turn into a girl?

Answer 1

He said himself that the form he take does not exert any special meaning or reason.

Answer 2

In the anime "Hellsing Ultimate," Alucard transforms into a girl in one of the episodes due to his ability to shapeshift. The transformation serves as a way to showcase his immense power and unpredictability as a vampire. It also adds a unique and unexpected element to the character's already complex persona.

Answer 3

It may be Walter's mother he may have turned into, or an old loved one. Either way, it's Alucard's way of playing mind games.