Poseidon is a huge flirt. He throws a wink or smile at any girl he comes across. He seems to be a bit self-centered, believing that he's the best at everything, which makes his rivalry with Athena hard. But, deep down, Poseidon is a nice guy who respects Athena's accomplishments.
Poseidon is a tall, slender teen with a tan complexion, light brown hair and turquoise eyes. He is usually described as the handsomest boy in school.
Like most characters in the series, his outfit varies, but his is mainly sea themed.