Well, if the most likely depictions of him would be of this "persona" then I'd say use the meme name for the character. You can always put the real name of the person behind the depiction in the wiki.
If depictions of him not of this "persona" appear later, then can use his real name for those depictions. Images like this could receive both the meme nickname (as it tags these specific depictions) and his real name.
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