Yup! Ard will be recruitable, as will every main girl, all the side girls and as many of the one-shot girls as I can manage.
Ard will, of course, be the NUCLEAR SEDUCTION option. Game ends when he uses his ultimate skill because, really, where do you go from there? You'll have already seen the best the game has to offer. So you'll use the skill, the game will start the outro, then turn itself off, delete the entire game from your drive and finally immolate your computer in a ritual viking funeral.
After all, no single piece of software should contain such power. And how will your computer be able to focus on its tasks from now on? No... no, it's for the best.
(The first sentence up top is sincere. The rest of it less so ;) )