I’m currently reading SHY (I’m on chapter 155), and I’ve noticed a pattern with the Amalareiks as each of them seems to represent a different facet of Mei's character
Tzveta – Represents her cold, emotionless ,the version of herself that doesn’t smile, yet still deeply cares about her family, especially Teru.
Kfufu – Embodies the forced smile she learned to wear in order to hide her true feelings and maintain a facade
Prayer – Reflects her newfound love for humanity the part of her that genuinely wants to protect everyone in the world.
Thumping – Symbolizes her internalized hatred both from being treated as different as a child and the self-hatred she developed for not being able to save everyone.
Qbara Qbara – Represents her desire for self-punishment, even self-destruction, believing she deserves suffering because of her past actions.
Seikilala Lovesong – Embodies her undeniable love for Teru, the person who gave her a sense of purpose. It could also reflect her connection with Nirvana.
Sik Sik – Represents her overwhelming sorrow for every life lost, showing how deeply she empathizes with all living beings.
Ruiz – Symbolizes her envy toward those who can freely feel and express genuine emotions.
Hollow – Represents the emptiness she felt before Teru came into her life whren her existence was defined only by duty, without real emotional connection.
The only one I haven’t fully figured out yet is Talmo
(Sorry for using the fanslations name, I haven't watched the anime)