Gay bill cipher

Bill Cipher, stripped of his powers and locked in a cosmic rehabilitation facility, is about to get one last chance—or punishment. The Axolotl has made a decision: send Bill to Earth, powerless and mortal, to live among the family that once destroyed him.

he is either a bisexual Bill or a trisexual triangle. He’s bi. He is a being of pure energy with no weakness. Who cares. From all the answers I've gathered, Bill's true sexuality is: A-gender and aro-ace (A-gender is a person without genitals and aro-ace means they're not attracted to anything).