Little

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A little is a headmate that behaves or otherwise feels like they are a young age. This often approximately caps at age twelve, but may vary personally between systems based on their body's age.

Related Terms
Syskid was coined as an alternative to the term little.

Middle and big are other common age indicators. Age sliding is when a headmate varies in how old they feel, often going back and forth between adult and little, but can be any ages. If a little holds more "adult" kinds of trauma, they may use the littlex label too.