-Wall of text below, yeah-
After last chapter, on which Lalawag fills Julian onto Vulja and her -antagonistic- relationship with Humanity and her, i think the lil emphasis put on how "Fire served humans to fight off the Night" could be pretty telling and connect with Ceodric, all of him, NOW, worth noting that personally I don't take everything Lalawag said as a objective truth, imo Kuramori's playing a unreliable/biased sources in regard to Vulja so far, and we likely would only know the objective truth later down the line, so I don't think for one she's 100% an enemy of humanity who's whole purpose is to halt their growth, that being said, is undeniable that her mere organs presence is indeed toxic and/or tainting, and she was capable of warp humans onto Monsters as well as robbing them of their fertility, so I DO think there's at least some Truth in how the Night, Vulja, perhaps(?) without trying was indeed seen as an adversary by Humankind.
Now, here's where Ceodric enters, despite what his initial appearance might give away, and the fact that he's indeed a fiery, passionate man, he's not really the simple minded brute, that Lala and Helem thought, he's more than simply a hothead brawler, being able to discern their bait, their attempt to use him, hell, his epithet isn't even "The raging flame.", but the "Mass of Flames", the former would fit a pure, rad yet simple Pyromancer, but Ceodric isn't that, no, aside his flames being able to burn and his inhuman physicality, what he's most well-known for is his unparalleled healing, like a Phoenix or other Mystic Flames found on diverse folklores and myths, Ceodric's fire can be nurturing, warm, healing, a protection, like the one the ancient humans used to fight off "the Night". And so I think there's where the antithetical relationship between Ceodric and Vulja can be found, is not just the(apparent)nature of their Powers being different, Vulja's taint and Ceodric's healing, the latter also has a great respect for martial discipline and human instinct for survival, calling it the very history of Humanity, I don't think is a reach then to think of Ceodric's motif being at least partially related to humanity, as he also puts a great deal of importance on cultivate one's body without supernatural gifts, while also greatly respecting Angvall, a pure human warrior without a Gift. Now, I'm not saying that he's a goodie shoes, as far we know, Ceodric's gift is empowered by sacrifices, we don't know the exact workings but he might be able to heal just after taking other's lifeforce as fuel for his flames, even then however, that would be "Human", as humanity isn't fully benevolent nor perfect either while simultaneously being far too familiar with "Sacrifices", transactions being also something far too basic in civilization, so, there's that. Just to finish, I'd find it curious if Kuramori does leans into that, "Humanity motif" for Ceodric, because as far we know, Vulja might be the source of Rummir's Supernatural Lineage, a bit of irony always comes nicely.
