I have kind of said before that a lot of things in consumerist culture are almost modern myths these days. Pokemon is the easiest example - it's such a massive staple of modern culture, especially amongst furries, that it's a real shame that the creature designs are bound to copyright. The power of fandom is in taking these designs that are core to peoples' minds and feelings and expressing them as the shared myths they basically are.
When it comes to the Persona series, my understanding is that they only use concepts that are public domain. But there's a lot of things in modern culture that are important to how we express ourselves and ideas that I wonder, if the series wasn't subject to IP law, what other big cultural icons would exist as personas?
Off the top of my head, Pikachu, Mickey Mouse, and Cloud Strife would be obvious choices. (I'm not including more than one case per IP unless they'd be equally powerful cultural icons, so even if amongst furries Lucario might be notable, it's not globally impactful.) Rudolph the Red Nosed Reindeer is a less obvious one, but I'm including that because it's another victim of not being public domain. Sherlock Holmes has just entered public domain or something, though perhaps more like its got its foot in the door.
I wonder what else is a cultural touchstone despite IP/copyright law. Maybe Harry Potter, but it's better we don't acknowledge that. (Perhaps that's one advantage to not using modern properties like this, as long as the feelings the iconography hold could change during story development.)