From Pluralpedia, the collaborative plurality dictionary
co-conscious (adj.)
Other formscoconscious, co-con / cocon (adj.), co-consciousness / coconsciousness (n.)
Synonymsco-aware / co-awareness, co-presence / co-present, shadow / shadowing
Applies toheadmates, system functions

Co-conscious (also called "co-aware") refers to when multiple headmates are active at once. This is distinct from co-fronting in that these headmates aren't necessarily fronting, they may be in headspace or otherwise experiencing the outside world such as through internal communication.