Sponge Headmate

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A sponge headmate is a headmate within a system that tends to have other headmates fuse into them. This type of headmate is a sort of magnet for fusion. The sponge headmate component always absorbs the other component(s), although they might change. Sponge headmates are likely to be important to the system's function, like an officium, caretaker, gatekeeper, or host. Sponge headmates cannot be fusionflux, it must be a permanent fusion.

An example could be a caretaker that has been in the system for a long time, that has had headmates fuse into them often, but retain most of their identity and personality.

History
The term was coined by the Timekeepers on September 27th, 2023 for their& officium and jack of all trades, Grell.

Related terms
Could be considered a kind of endurative.

Admirer may overlap, and reiterative and spawner may be considered antonyms.