Help with my character's story/name?
Well there isn’t a God of the Cosmos. The only recognized “Gods” in game are the Human Gods. This wouldn’t work because Charr look down on God-worship, and are especially disdainful of Human Gods. The other races, Charr included, view Human Gods as beings who became powerful, but who aren’t really divine or worthy of worship.
So, perhaps your charr could find a powerful celestial artifact or armor that imbues him with magic.
Or, perhaps he was captured and experimented on by the Inquest asura—they could have been studying cosmic power and its effect on people—and the experiments turned his flesh into living magic or something
Maybe he sought out and was blessed (or cursed) by the ancient Druids of the Maguuma Jungle. They’re not Gods, but they are very powerful nature spirits.
Maybe he is a scholar/researcher who has learned a new way to channel his magic, which other people haven’t discovered.
As for names… maybe Arcius Moonbrow? or Aceius Starpelt?
Well, remember that charr last names are composed of two parts: one part is common among the whole warband, and the other is distinct to them. So what “Swiftpaw” part of the Swift warband or the Paw warband? It doesn’t even have to matter; nothing says he stayed with that warband, or the Identity Repair Kit (which I assume you’re using) could completely rewrite his history. However, that might help in deciding how you want your charr to sound now.
Now as for how he got those powers is a more interesting question. There are lots of relics scattered over Ascalon he could’ve stumbled upon, or perhaps it was something in the Maguuma. All the old druids had mysteriously ascended, became the ghostly tree forms we see in GW1 and 2, so perhaps he tried to follow this ritual and got caught partway through. Or, since crafting Astralaria is one of the long quests, one of those steps to craft Astralaria will inspire you in just how he gained his powers. Perhaps Astralaria itself is what granted him the power.
Thanks so much guys! Such great help :‘) I think i’m gonna go with Aceius Starpaw, i really like that! And i like the idea of the maguuma druids teaching him things, and maybe using that with a process in astralaria to become this powerful star bending Charr, thank you!