Cranial Twin

Cranial Twin (minor) by Stone Gargoyle

The character is actually twins but does not appear so.

Dual Brain: The character has two brains in one skull. This gives them an overly large head but they are otherwise normal. Each brain will have separate IQ, ME and MA stats. They both take turns controlling the rest of the body but more often than not have different interests and alignments. There is an internal communication, so they gain +10% to any skills they have in common. There is no need for traditional sleep, as they take turns doing so.

Penalties: If in stressful or combat situations, the character might suffer -2 to initiative as the brains fight for control.

Other bonuses: +4 vs. mind control and possession.