Thera is the Omnitrix’s DNA sample of a Themm from the planet Themmpire in Ben 10 Fan Fiction: World of Light. They come in three forms.
- They are based on the Mii Fighters.
- Their name comes from the words "They’re a".
- They are the only fanon Puppet Aliens in Ben 10: Fan Fiction: World of Light.
- When possessed by a Spirit, they will resemble the Spirit. The Themm naturally have shapeshifting abilities.
- They are free use. The version of Thera used will look like the 'trix weilder, and I can provide art for them if you want.
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