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Isabella Hartley

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Isabella "Bella" Hartley

Bella As Mermaid

Portrayed By:
17-18 (Season 3)
Human (formerly)
First Appearance:
Last Appearance:
Best Friends:
Love interest
Will Benjamin (boyfriend)

Isabella "Bella" Hartley is one of the main characters in the third and final season, in the Australian television series, "H2O: Just Add Water". Bella discovered her powers after her trip to Sea Caves of Ireland. She is portrayed by Indiana Evans.

Personality and Character

Bella is a bit withdrawn and sensitive because she's a mermaid, meaning that she can be afraid to reveal herself, but cares deeply for her friends (especially Will, because of her feelings for him). Bella is also described as being a bubbly ball of energy that is easy to talk to. She enjoyed walking around in Ireland fields while her family were both at work. Later she became a fun loving girl with her new two friends.

Rikki's Cafe

Bella initially tried out for a waitress job at a café called "Rikki's", but Sophie Benjamin twists her chance by adding a spice in a customer's drink in which Bella is held responsible. But she continues to work at the café as the lead singer in Nate's band.


Bella has honey-blonde hair that cascades down past her shoulders. It appears to be a naturally wavy texture, as evidenced when she wears it loose. She often styles it by braiding it to the side. Usually, she wears it down. Bella's eyes are ocean blue, and she has a bronzed complexion. She is not quite as tan as Cleo but not as pale as Rikki and Emma. She appears to be the shortest of the mermaid trio. Bella has a slim yet curvaceous figure. Out of all the girls, she wears dresses the most. She wears colors that reflect more earthy tones, such as greens, blacks, and flowery designs. Bella, with the other two mermaids, is never seen without her signature blue necklace (with the exception of her mermaid form.)


Isabella "Bella" Hartley is the new girl who moves to town in series three after Emma left to travel the world with her family. When a mysterious water tentacle attacks the girls and captures Rikki, she jumps in to save her and Cleo catches sight of her tail. Although shocked at first, she quickly reveals to the girls that she is a mermaid as well and helps to save Rikki from the water tentacle.The next morning, the girls and Lewis discuss her transformation and she showed them her power on Lewis' drink, Gelidkinesis which turns water into a gelatine substance and magically transforms back into water unless hardened. The girls then ask Bella to join them, which she agrees. She has also been described as bringing something that the group has never had before.

Becoming a Mermaid

Bella became a mermaid with nine years of age in Ireland. She was with her parents in Ireland, but they were too busy at work and she spent finding a Sea Cave. When she jumped into the pool magic and mystical of the moon on a full moon night, she became a mermaid. After many years, Bella found a dark blue crystal at the bottom of the moon pool where she became a mermaid. Since then she tied this crystal in a brown string and has been using ever since. In 1700s an Irish girl named Eva has become mermaid the same place.

Mermaid Powers

Bella possesses the ability to transform into a mermaid ten seconds after at the touch of water. Once her body is completely dry, she turns back into human along with the outfit she was wearing before she transformed. Just like Cleo, Emma and Rikki. She has the ability to swim at super speed of 600km/h, hold her breath for more than fifteen minutes, and dive at a depth lower than any ordinary human being is capable of.


Bella has the ability to transform water and all things that contain water into a jelly-like substance, normally called Gelidkinesis. Bella also shows the ability to change its viscosity. It was also shown that if she wants, the water will return to its normal state after a few seconds, but if she will not, the water will forever be gelatinous.


Bella also has the ability to transform water and all things that contain water into a substance similar to crystal or glass, normally called Substanciakinesis. With this power, Bella can hardening the water, rendering it indestructible (unlike ice, that would eventually melt away or breaking). It was also shown that if she wants, the water will return to its normal state after a few seconds, but if she will not, the water will forever be rigid.


Will Benjamin

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Bella and Will kissing underwater

Bella develops a crush on Will almost as soon as she moves to town. Because he is often curious about what he "thinks" he saw, Rikki always tells her to stay away from him to keep their secret safe. As they become closer, Will starts to have feelings for her. On one occasion, he accidentally dripped water on her chin and she is forced to run into the ocean before she transformed into a mermaid. Will then becomes suspicious of her and pours a glass of water on her hand, forcing her to transform in front of him. Although shocked at first, he agrees to keep her secret (though she keeps Cleo and Rikki's identities a secret).

However, Bella often hears Will talking about mermaids and the magic of it, and begins to feel that he is only interested in her because of her mermaid magic and breaks off their friendship. Eventually, they become friends again after Will finds out that Cleo and Rikki are mermaids as well. In one episode, she mistakenly hears Will asking Rikki to a party and decides to go with Nate to make him jealous. At the party, they clear up the misunderstanding and officially become a couple.


  • Her full name Isabella Hartley is revealed in the last episode, Graduation.
  • She and Lewis are the only main characters whose houses were never revealed in the series.
  • She never met Emma, and possibly never will.
  • She was turned into a mermaid in the Sea Caves of Ireland unlike Cleo, Emma, and Rikki in The Moon Pool.
  • Her favorite color is green and wears clothes based on gemstone colors similar to her power.
  • The show didn't reveal her being affected by the full moon, but maybe before she moved and met Lewis, Will, Cleo, and Rikki, she was once affected by the full moon.
  • Due to Bella moving every year it is unknown what country she is from, it is most likely she is Australian or Irish.
  • Bella's parents and house are never shown in the series. It is unknown if she has any siblings.
  • Indiana Evans, who portrayed Bella, dated Angus McLaren, who portrayed Lewis McCartney.

Bella's Gallery

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