Characters whose origins are not fully understood, and who may be perceived either as terrestrial or extraterrestrial.
This is not to be confused with beings from other dimension, alien hybrids or with alien creatures which are descendant from Earth species.
Before you add any ambiguously alien creatures to this wiki, please talk to an admin about it.
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- Shape Shifter (Gravity Falls)
- Shrikethorn
- Silicon Fungus
- Six-Limbed Mammalian (Samurai Jack)
- Skeletal Fish (Samurai Jack)
- Darth Vader
- Luke Skywalker
- Solarian
- Solgaleo
- Sonic the Hedgehog
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- Spring-Heeled Jack
- Starcast
- Starmie
- Sulphuric Dwelling Critter (Teenage Mutant Ninja Turtles)
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