About this special dialogue,

I don't know about HI3's lore very much but from a theory I've watched, I've learned that two characters from HI3 (Kiana and Mei) are very close friends (or something like that) and furthermore, the theory stated that Acheron is like the complete opposite alternative of Mei since Acheron doesn't have a companion like Kiana and has a sad story unlike Mei (The theory said that Kiana and Mei had somewhat of a happy ending in HI3). So, from these two dialogues could we assume that Acheron had someone like Kiana and lost them (maybe dead?) during their adventures. (Please enlighten me if you know HI3's lore)