Doppio and Diavolo (JoJo's Bizarre Adventure) are two different personalities which share over the same body
Summary
Multiple Selves is the ability and/or state of one's existence, which enables a character to have more than one personality, mind, soul, or something integral like that, co-existing in a singular body.
Types
Type 1 - Multiple Personalities: A character who has more than 1 personality inhibiting their body. This isn't necessarily an ability, as it can also be a condition. However, certain characters can be granted various advantages from having multiple personalities. For example, the two personalities, who might have different type of knowledge and skills, can share it with each other to aid in battle. Oppositely, their battle for dominion of the body could distract them from a battle, potentially losing it or harming.
Examples: Peter Stancheck (Valiant Comics), Ichigo Kurosaki and Yoruichi Shihōin (Bleach), Diavolo (JoJo's Bizarre Adventure)
Type 2 - Multiple Souls or Minds: If a body is a host for more than 1 mind (different from personality), soul, or another integral abstract thing. This type also covers external spirits or non-physical entities that lives within its hosts.
Examples: The Sentry (Marvel Comics), Yuji Itadori (Jujutsu Kaisen), Shadowman (Valiant Comics)
Type 3 - Multiple Organism: Multiple organisms. such as symbiotes, parasites, multiple heads, or similar, sharing or forming a singular body. In addition, this type covers Hive Mind, where multiple bodies or vessels share the same mind and/or consciousness. This type also covers characters who wear parasite-like almost alive mech or armour.
Examples: Bloodshot (Valiant Comics), Venom (Marvel Comics), X-O Manowar (Valiant Comics)
Possible Uses
- Each personality can have skills, and possibly powers that the other do not.
- Having multiple personality would allow for a character to gain the other's intelligence.
- A defense to mental attacks, as if the main personality or mind is under attack the other could take control and fight in the main ones place.
- Similarly, a defense to soul-related attacks - if the main soul is under attack, the other could potentially remain unaffected.
Possible Limitations
- The personalities, minds, souls, or other, could fight over control of who's the main one, distracting them from the fight or disagreeing on the path to take.
- Luring one mind or personality into a trap without the others realising.
- Some minds or personalities do not share memories with each other, making it harder for them to live day to day live.