Meng Sheng is a fierce embodiment of queerness and is a big supporter as Lazi navigates accepting her own identity. However, he also tries to push her towards depravity; he relishes in his own depravity because he sees no point in meaning or significance, because that acceptance of nothingness is what death is. That may be how queerness feels, that you learn to let go of the labels and meanings society puts on everything because you don't fit in them.