I'll be doing a full video over it. The nitty gritty though, I simply contacted Swimbananas, her dm's are literally open on twitter. Ultimately whenever someone tells me they are something or someone I go with it for their sake and if they continue to be around me I try and get the truth on the matter. I worked with rioters, got their approval and we were good to go! Truth is, I never believed her in the first place.
Edit: It also doesn't help there is a Riot Lily and Riot Lilith with one L. There's no way Riot would be okay with such a similar name.
I'm not an expert on the topic, but I don't think there's much (if any) policy around "similarity of Rioter names." There are at least two Riot Penguins, and probably a variety of other similar and/or exact match Riot names. Situations where that matters just don't really come up (the only situation I can think of was some humorous confusion around which Riot Penguin was being referenced in a random normal game I was playing).