How do you write a merge of personalities?

[BearlyAlive]

If it's the "same" person fusing, wouldn't that just mean they get an update on the things their "own" self is worse than their counterpart?

 

[NotaNuffian]

If it's the "same" person fusing, wouldn't that just mean they get an update on the things their "own" self is worse than their counterpart?

... if you mean the elimination of bad habits, maybe yes.

But how do you deal with sociopathic tendency merged with someone normal? Becoming a ruthless person with the ability to care?

 

[Cipiteca396]

Mind you, I understand the idea will be that the dominant personality is often the one "stronger" ie headstrong, tough, etc because that also how real life works, the strong leads while the weak slaves.

I'd love to see this subverted. The 'strong' soul tries to bully and push around the 'weak' soul, and the 'weak' soul just ignores it and slowly drowns it out. No matter how heavy the rock is, throwing it in the water won't destroy the sea.

How does one deal with the spiral of new, implanted emotions?

I don't believe memories are enough to change a person fully. You've already got that though, so...

Assuming you have two conflicting personalities living in the same head, they would probably not merge. They would compartmentalize and isolate their thoughts from each other. The longer they spend together, the more erratic their behavior would become as they tried to 'steal' head space from each other.

If they aren't in conflict, then they might end up sort of like twins.
"Hey remember that time we did (a thing that only one of them was actually there for)?"
"Yeah, what about it? Oh, I see. Good plan."
They might not recognize the difference between themselves after a while, and they probably wouldn't care either. If your other world self isn't so different from you, aren't you just the same person anyways?

If they can't get along, they don't merge. If they do get along, they won't care that they merged.

 

[AnUnknownMan]

Proposal: Have the ideals assert based on emotional merit, then character traits based on activity.

Example: Person A feels strongly about not having greed but had no particularly dominant habits. Person B was a thief by trade and thought of nothing but opportunity, but only because they were poor. Together they constantly stop themselves from thinking of money.

Every topic will be reexamined by the resulting merged character resulting in a constant internal dialogue/struggle.

 

[Terrate]

The best merges I've seen is unironically from Dragon ball. Vegito or Gogeta, when they fuse they are literally two entirely different personalities that are a combination of the two. And whenever they unfuse, they gonna start bickering with each other like any old couple like "What the hell you have/know this ability and you didn't show me?!" Pretty fair, no one feels like they were dominant, it's just two persons when combined creates a new person entirely.