Oliveri is gay (already pointed out)

Has PTSD

Both of his ears have scars under the bandages

Very protective over his boyfriend Star

Not good with other pokemon

Had a bad childhood

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Oliveri was alone in the forest he was attacked by some pokemon giving him scars but he was rescued by an Eevee named star he lived with Star and was fine around him one day he realizied he had a crush on Star and told a few weeks later and star liked him back and they starting dating