Character concept: A rugged and seasoned 58-year-old veteran adventurer who looks about 19. He's not an immortal or anything, but as his One Last Quest he headed out to find some kind of a fountain of youth or something alike to it. He now admits to himself that his whole plan was to die on this adventure - he didn't want to retire - but now that he actually found it and managed to achieve the goal he didn't actually really even want, he fucking hates it.
Nobody takes him seriously regardless of what he has to say. He had to start going by a different name since if he tried to use his old one, people would either laugh at his face for such a bold lie, or try to beat his ass for the disrespect of trying to claim to be This Famous Adventurer. He struggles to learn out of his habit of addressing every man who looks under 35 as "boy", because people keep assuming him for an insolent whelp looking for a fight.
Being young again is fucking miserable. The only women who are attracted to him are either far too young and only silly girls he can't find interesting, or women his own age who think they are taking advantage of a clueless youth, which he finds off-putting.
And now that his youth and vigour are renewed, he's pissed off to realise that they can't be turned off. He can't just retire, sit down and live a peaceful life. It doesn't matter that he's old and wise and wants to be calm, his body is young and restless and refuses to chill. So back out he goes to adventuring, despite of having seen all there is and knowing from experience that most adventuring quests are fool's errands that end in tragedy, and the spoils are rarely worth the work and sacrifice that goes into them.
He's a grumpy old man who just wanted to die with dignity, and now he has to do all this shit all over again. And he fucking hates it.
