@Name Reincarnation usually has a few ways it can work for the characters personality.
1. The characters entire personality is transferred over but their maturity level is based on the new bodies age.
2. The personality of the person the mc takes over combines with Mc creating a new person like fusion from Dbz
3. The main characters memories are transferred in the form of information to another person. It's like if you had you're own memories but suddenly gained the memories of another person.
It looks like the first one is what is happening here.
1. The characters entire personality is transferred over but their maturity level is based on the new bodies age.
2. The personality of the person the mc takes over combines with Mc creating a new person like fusion from Dbz
3. The main characters memories are transferred in the form of information to another person. It's like if you had you're own memories but suddenly gained the memories of another person.
It looks like the first one is what is happening here.