@azuremirage
First Prince.
At first, he went to the fief to see who was the one administrating everything(so he would scout that person to his faction), only to be surprised by MC, since he thought she was an immature girl. So he got interested and he is now helping as her assistant under the alias of Dean.
(That is the setting if my memories do not fail me. If you want more information just search for spoilers)