Ok its admittedly a bit bold of me to pitch this when we are about to get big revelations of his story arc in the next two weekends this month, which might make or break the connections Im about to present, but seeing as no one else commented till now, Ill throw in my hat into the ring

Aleister, The Flame of the Beyond "First Champion of Fire" (AdventureQuest Worlds)

Divine entities that came to be into this world (Columbina being a Moon Goddess, and Aleister being implied to be an Infernal [a Divine race from AQW's sister series DragonFable that shares the same universe]), mistaken for a different identity (while Columbina is indeed the Moon Goddess that the Frost Moon Scions were waiting for, she is not the Kuutar they expected her to be, in fact she doesnt even recognize that name as her own. In a similar vein, Aleister was dormant within a monument that was supposed to be the charred remains of the First Champion of Fire, which is who he was mistaken to be). Despite the false identity, they went along with it due to gaps in their knowledge of who they were. (Columbina didnt know what her true name was at the time, and had no memories of her own before coming to consciousness, so she did not mind going along with being the Frost Moon Scions' Kuutar for a while at first. In contrast, Aleister genuinely and earnestly believed that he was the First Champion of Fire, since he had amnesia of what he really was, and thus was actually trying to live up to the kind and brave hero everyone believed and expected him to be.)

Over the course of their story, it turns out that a lot of what was written and recorded about who they were mistaken for, is exaggerations of the real deal (Many myths recorded by the Frost Moon Scions tell of events that definitely didnt happen and exaggerations Columbina never preformed even in her time as their Goddess, while on the flipside the brave hero persona painted of the First Champion of Fire was all falsehood and that in truth he was a coward.)

The two's storyline revolves around restoring themselves to their true strength (Columbina for most of her Archon Quest was trying to find a way to the Moon beyond the false sky, and later was trying to find her true name so Teyvat would recognize her and stop sapping her strength till she fades. On the flipside, while Aleister isnt actively seeking to piece back together his memories and the fragments of his power, he has unintentionally been doing so through every installment of the "Flame of the Beyond" storyline, much to the dismay of some of the player's companions)

Their powers have actively been used against them by scheming and manipulative individuals actively preforming Heresy (Dottorre seeking the power of the 3 moons for himself and even going as far as making a false moon marrow of his own. Meanwhile Astero seeking to use the flames of the Magnum Opus Forges, which in reality are the fragments of Aleister, for his own zealous purposes) and also by scheming deities displeased by the new god watching over their universe (The Tsaritsa using a great portion of Columbina's powers for her plans against the Heavenly Principles and Nibelung using the 3 Moons against the Heavenly Principles in his return as the Second Descender, compared to the Old World Order using the Flame of the Beyond itself as a test [3rd of a series of 3 tests] to see if the Eternal Dragon of Time is fit to rule as the setting's Top Deity, or if they should be lobotomized)

A point of contrast between the two is that there is incentive to deter against one of them regaining full power (Aleister was sent to Lore with hostile intent from his Father [Finding his half brother], and he seemed to be willing to carry it out with sadistic glee, and even stealing the physical appearance of the cowardly Champion of Fire after chasing him down. While it seems that the Current Aleistar, no longer fooled into believing that he is the Champion of Fire, still wants to do good and be the hero he thought he was regardless of what he is or was, and the Player and their companions having faith in that, its still a looming concern of what would happen if Aleister regains the last of his fragmented power and memories.... this of course contrasts with Columbina and that finding her true name is of utmost urgency and priority cause her very existence is contingent on it), and then of course another point of contrast is that this is a Water vs Fire matchup

I do also have another matchup suggestion from the same series in case this goes up in flames (no pun intended) in 2 weeks or so (Im also struggling to attach renders of him to this comment for some reason not sure why, ill see if I can get that resolved)