Mixed, or mixing, may refer to:
- Mixed systems, or systems containing both median and multiple members
- Mixed origin, a descriptor for systems with more than one origin
- Blending, when the boundaries between headmates blur and they become hard to tell apart
- Merging, when the boundaries between headmates blur so far that they are no longer meaningfully distinct for a period of time
- Blend, a temporary mix of headmates created as a result of blending or merging
- Fusion, a more permanent mix of members who are now one headmate
- Faitive, an introject who is a mix of fictive and factive
- Mixed-source, an introject who is a mix of multiple introject identities
- Amalgamation, a process through which a headmate gains (more) sourced identities
