Lagoon Boy (real name La'gaan) is the protégé of Aquaman, and a member of the Team. He is a former classmate of Kaldur'ahm at the Conservatory of Sorcery. By 2016, his demeanor was still easy-going during more casual situations. However, he has shown frustration at the lack of action he receives during field missions and has demonstrated times of aggressive impulsiveness when it comes to battle. He often uses Atlantean slang and euphemisms in his speech; he is especially fond of using "Neptune's Beard", and calling people who he does not particularly like as "Chum". Some, like Superboy, consider him a jerk, a feeling that La'gaan seems to return, mostly out of apparent jealousy in regards to the past relationship Superboy and Miss Martian shared.

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