Planeptune's Guardian Goddess, and the protagonist.
She often loses her memories throughout the series, but according to her, this happens to protagonists all the time. Despair and desperate situations are no match for her innate positivity as she battles against Doomsday.

She loves pudding and hates eggplants. People often mispronounce her name.

Neptune's Goddess Form.
The difference between her regular form and this one always shocks people, and it's hard to believe she's the same person.
She's always calm and composed. Her care for her friends doesn't change one bit, and she possesses a burning sense of justice.
However, it's supposedly tiring to stay transformed, so she often reverts once the battle is over.