He has a sort of hero worship/platonic crush towards the MC, mainly if you trick him often. He's been waiting his entire life to pick up his ancestor's mantle and the MC might just be the absolute perfect master in his eyes.
No matter what, however, he would only have this on a platonic level. Some things are sweeter and more precious when kept as fantasies. Assuming you've tricked him often and been a very heretical master, what Nikos has is already very dear indeed.