They share dreams, responsibilities, wishes, desires and love for humanity and more, the names is nothing compared to the other things, even their enemies are too close to be similar, abyss, black tide and honkai and gods.
That’s besides the design and their way of thinking.
the concept of sonnet as the iridescent moon used to be teyvat original ruler of death, yet she is the opposite of what people gonna think of "death"
she wanted to save everyone, even the one who cannot be saved.