Upper Layer's Shared Kintype
Some type of eldritch being.
No known memory-like noemata: The identity was created in this body and is growing with us. We get the sense that if we were born with an aligned form, our relation to humans would be coincidental. This kintype is associated with idle observation and causing large changes by accident.
Being easily describable causes dysphoria. We don't have a visibly consistent form. Nameless or refusing to stick to a name.
Immense: takes up a whole headspace and all the residents within it. Appearing in multiple places at once, but still easily passing messages through the entirety of itself. Different residents embody the kintype in different ways, but are generally prone to regular shifts in identity. This can include being a subsystem of constantly fluctuating numbers, or taking on the identity and thoughts of other residents we speak with. Possibly fractal.
Plurality is a core part of the identity; being all alone or together but completely separate feels wrong. The sense of physical and internal scale, as well as influence from dragons in the lower layer, is likely why we relate to hydras. Certain hiveminds also resonate.