To me he's the kind of old dude that goes and stares at the cultivated fields for hours with a frowned face and his cane, no matter the climate or time, never saying a word.
Severus is from the north of Spain because there’s no way he could ever be Mediterranean, like, never in his damn life. I mean, he’s the anti-Mediterranean character and the anti-Mediterranean physique. For me, in my head, he’d be Basque because it’s such an industrialized territory. Of course, he’s retired to a house in the countryside, somewhere where no one can bother him in a village lost between Vitoria and Donosti, the fewer people the better, like 10 inhabitants. That way, he doesn’t have to speak to anyone, but he’d love to have a tavern to grab a few drinks every now and then. He pretends to be fed up with his grandchildren, but they’re the only ones he gives some money to so they can buy football stickers. His mixed heritage is clear because his first surname would be Spanish and the other Basque, so he would still be half blood. In this universe, Tobias is basically an immigrant who came to Euskadi from Vallecas and seduced an Eileen who came from a family with at least ten surnames of Basque ancestry, and who was a co-founder of the PNV (Basque Nationalist Party). It all makes perfect sense, and if you really know about Spanish sociopolitics, you’ll agree. If you don’t, then you don’t understand the politics of your country, and that’s why we’re doing so badly. End of story xDDDD