Heart Aino (Extraordinary Rare Maiden), is the titular protagonist in the Arcana Heart series.
She returns in BlazBlue: Cross Tag Battle as one of the Season 2 DLC/Arcade Edition playable characters.
Awfully cheerful and innocent, Heart is a type of person who believes that there is no such thing as a truly evil person. Having grown up watching every TV superhero show possible, she has desire to spread LOVE and justice where she can, even she isn't wanted. She is also a Maiden, a person who can see and interact with Elementals called Arcanas, and generally can get along with many of them. Because of this, she is considered special among other Maidens, which has drawn the attention of many people.
- Heart is the first downloadable character to represent a lead character from different series.
- Heart is the second character who is completely named after titular home series, the first being Ruby Rose. Conditionally, both Heart and Ruby are the titular female protagonists of their respective home series.
- Heart encountered two Senran Kagura characters in two different games, the first being Homura in Nitroplus Blasterz and Yumi in Cross Tag, with the former character is also datamined for her potential future DLC appearance in the post-starting Season 2 of the latter game, should Homura herself officially confirmed in the future, means it marks a second time where she and Heart encounter each other.
- In an official April Fools' Flash Game by Arc Systems Works and Examu, Heart went on a date with Ragna the Bloodedge.
- This is the first time she has been dubbed for English audiences, which is soon applied to rest of Arcana Heart cast.
- Heart has color palettes of the following characters: Ragna the Bloodedge, Yu Narukami, Hyde Kido, and Ruby Rose
- The color 13 appears to be original.