忘川惡鬼

The name translates as 'a devil in Netherworld River' or more poetically 'a demon on the Forgotten River'. In traditional Chinese folklore and some popular novels, the Underworld River, also called Lethe, makes you forget your past when crossed, leading into reincarnation. The term evokes mystery, a connection to the nether regions and a somewhat darker side or story about its user. It's like saying that I have something unforgettable or regretful in my past life which has made me change now, almost like a ghost or fiend.