Moving characters around seems to work out fairly easily.
Only question I have now is whether it is possible to add a claim to a character, and if so how? For instance Rickon has a claim on Winterfell, but Tyrion does not have one on Casterly Rock. Yet at least at first glance the entries for the characters in the save file don't appear to have a major difference that would account for this.
It's possible
again easiest is to edit save game files.
search (ctrl+f) for the title you want by it's tag (you can find them in world_names as mentioned before)
till you find something like this:
title = {
tag = C139
tier = county
liege = ICEL
holder = { character = { type = 10 id = 1137 } startdate = { year = 1101 month = january day = 10 } }
claim = { id = { type = 14712 id = 10072 } character = { type = 10 id = 2496 } date = { year = 1098 month = december day = 25 } }
claim = { id = { type = 4712 id = 3675 } character = { type = 10 id = 139 } date = { year = 1101 month = january day = 6 } }
}
the tag is meant to name the Title. Here you can see who holds it and who has a claim on it.
If you want to add a claim just copy a claim from other title under the tag of the title you want. But do not forget to edit the Character info so that the character you want gets the claim.
for instance if I would want to add the claim to Tyrion (search his ID, in my save file its 5190) in my save file for tag =c139 it would change into:
title = {
tag = C139
tier = county
liege = ICEL
holder = { character = { type = 10 id = 1137 } startdate = { year = 1101 month = january day = 10 } }
claim = { id = { type = 14712 id = 10072 } character = { type = 10 id = 2496 } date = { year = 1098 month = december day = 25 } }
claim = { id = { type = 4712 id = 3675 } character = { type = 10 id = 139 } date = { year = 1101 month = january day = 6 } }
claim = { id = { type = 4712 id =
3676 } character = { type = 10 id =
5190 } date = { year = 1101 month = january day = 6 } }
}
bolded the changes
also do not forget to give the claim an unique id. to be sure it's unique just search for id = 3676 and if you find anything try another number
this should work. let me know if it does