I did some digging and found out that Mc is actually 27 years old, also the correct translation of his name was Ludger Cherish (I honestly prefer Ludiger Chelsea), here is some deductions that I did:<br />1. Bretus Kingdom succession has been happening for 20 years, meaning Mc must have ran away when he was 7, and in the same age frame he met Grander (his master and the only True Blood Vampire).<br />2. Keeping in mind that Grander have been sleeping for 7 years, the last time he trained with her must have been when he was 20, meaning he have been training under her for 13 years (7 to 20).