Arista is the fifth daughter of King Triton and Queen Athena. She wears her hair in a ponytail similar to Aquata's, although their bangs are different. She tends to take a lot of Aquata's things in Ariel's Beginning. In her television appearances, she tended to be jealous of Ariel's adventurous ways and joined her on adventures. Based on the prequel, she is the most energetic one, though she adopts a more by-the-rules personality, by the time of the TV series, as shown in the episodes "Against the Tide" and "Beached". Although, in the latter, a small bit of her energetic side surfaces again to help Ariel stop thieves from robbing the Royal Treasury.