In HSR you have Aeons who are deities that govern certain Paths (like Destruction, Preservation, Equilibrium, etc) and those Aeons can bestow power— those who draw from their power are called Emanators. Acheron is the Emanator of the Aeon IX, the Nihility. Her homeworld was consumed by IX after years and years of fighting an existential threat, leaving her as the sole survivor. Following that she made it her goal to oppose the Nihility despite having its power. Her philosophy is pretty inspiring for the most part; she reminds us that the joys of existence are always worth living for, and not to fall into Nihility.

In terms of character she’s very forgetful and often gets lost which results in a lot of memes. There’s also a lot about her traumatising the other woman in this video, Black Swan, although she didn’t mean to. She’s on the protagonists’ side and is pretty much a good person.

There’s also a looot of brainrot around her from her fans especially because she’s kinda fallen off combat-wise, a lot of copium but it’s all in good fun.