Did the Mc travel back in time? Or did he Help the previous era in a way? because that is the only reason i think they should know him personally like they did in this chapter
Yes that a possibility But than Why did more people of the previous Era survive? im not sure But didn't Mobius also Died when Herrscher of the end did her thing and they spoken of they know the Mc personally
Ero_Tenshi:Su is always checking the future to search a timeline where Humanity wins against Honkai, he probably saw mc in one of them and sent the info for others.