reading the novel and everybody's names are in Chinese or have good names but wtf is worri...

I think that it's kind of a good thing, it would explain the joke better

Because it's their codename or alias. You know if you're part of any organization like gangsters or mafias, you don't use your real name.

That-
That's their real names tho--

I thought it's their codename because who would name themselves Spray of Flowers, the Devotee, Nameless Nie (btw Nie is the surname of the uncle of little devil, Nie Clan)

I've read the novel, maybe the others are code name but Nameless & Worriless Nie are their real name I think