Originally uploaded to Bilibili.tv
And as expected she is the perfect catalyst for the unique mechanics of her "element." I actually think she's more or less a rehash of Nahida from Sumeru. Unlike the other new characters, she can trigger all of the current Lunar reactions. Previously the new characters only had access to the reaction related to their element so for example Nefer could only do Lunar-Bloom. Sadly Columbina still requires at least 2 Nod-Krai regional characters in order to get a buff called Ascendant Gleam. Lauma who was the first of these characters to exist was probably the only one who could be better off without it which imo also made her the best one since that means you could put her on any team and Hyperbloom was already the strongest reaction in the game. But Columbina also becomes the first character ever that can revive characters. We've had healers since the game's launch but the only ways to revive a character are to totally game over like drowning, use a revival food item or go to a Statue of the Seven which also heals. Of course Columbina can only do this when you're in Nod-Krai so that's a pretty strict limitation. And it only works for overworld exploration. You can't use it in boss fights or while farming inside of the dungeons. In other words it's more like a safeguard against accidents. You dove off a cliff and didn't open up your wing glider in time. You didn't realize you were standing in a patch of grass that was on fire or you were too close to a torch. You afk'd and got aggro'd by some enemies.
However the other characters on her banner are questionable. Fischl is a character everybody gets and most old players have her fully maxed out at that. She's actually a good character though and she was also recently buffed but for a different set of mechanics. That's where it ends though. Ifa and Sethos aren't really useful characters. Ifa has a little healing capability but I don't think anybody ever uses him. Ineffa is unfortunate. She released in v5.8 just one update before v6.0 and the new Nod-Krai characters. The second of these characters to release was Flins who easily powercrept her with his enhanced damage percentages. Therefore I think the only reason to go for this banner is Columbina and miHoYo was clever here because you always want to go for the Archon Characters in this game.
That said, from a lore perspective Columbina is actually not an Archon. She's the moon goddess who may or may not surpass them in power level.
And if you like discussing the storylines of games please click here to check out Hive Gaming Theories!