Kyle
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He loves water and enjoys swimming - this is probably from Kyle's avatar!
For now, let's execute Kyle.
Yes, I agree, the clue fits me... but it also fits others... ;)
Why didn't you mention them?
This clue also fits Lizard, Neira, and Tieru.
To be honest, I'm more inclined to think it's Neira. But I'm not ready to vote yet... I need to think it over carefully.
Кто состоянием своим доволен, тому жить весело. (с)Алекса́ндр Васи́льевич Суво́ров