Schantofabi

I have a question regarding excursions: I started a game with VWA and there are several PGHW wrestlers on excursion in my company. I am now more than two years into my save and all the other PGHW Young Lions have left, and some new ones have arrived, but Shinji Mihara is still here. Is this because he likes how he is booked, or is it an error in the initial database? All the new excursion wrestlers do have a limited contract, but his seems to go on forever. Will he eventually leave?