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"Sunao Heat" (JP) is a term for a hot-hearted character who expresses their deredere honestly and straightforwardly from the very beginning with an intense passion. They express their feelings enthusiastically and are passionate about love and the person they love. They are the kind of character who will suddenly burst out into an intense love confession to their love interest one moment and be all lovey-dovey towards them the next.
Etymology
Meaning of the Term
Sunao heat (素直ヒート) comes from the words "sunao" (素直), meaning "honest" or "straightforward (upfront about one's feelings)", and "hiito" (ヒート), meaning "heat (an intense and passionate feeling, enthusiasm)". The word "sunao" (素直) itself comes from the word "su" (素), meaning "real feelings" and "nao" (直), meaning "direct or bluntly (being straight to the point)".[2][3][1]
- Sunao = Honestly expressing feelings of dere
- Hiito = Intense and passionate feelings
They will honesty express their intense and passionate feelings.
Origin
The archetype was created as a derivative of sunao cool on the Japanese Internet in 2006.[4]
Personality
Rae Taylor intensely confessing her undying love to Claire François from I'm in Love with the Villainess
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Sunao heat characters are very passionate, especially when it comes to love and their love interest. They are the type who expresses their thoughts towards their love interest honestly and passionately, sometimes overwhelmingly, and may suddenly burst out in a love confession. They express their love and affectionate openly and they love their partner wholeheartedly. They act like a very passionate and intense deredere character.[2]
Differences From Other Archetypes
This type is very similar to mega deredere since both types are very open with their affection and give large displays of affection, so many characters will be both types. The main difference is that mega deredere is more based on fawning over their love interest and admiring them, while sunao heat is about passionately confessing their love.
It could also be seen as being similar to an uzadere character who's passion is their love interest specifically. So instead of ranting about random things and being annoying in general, a sunao heat character will yell about how much they love their love interest.
Their directness and outburst of love is also similar to that of yandere, but yandere also includes downer types so not all yandere are heated. Sunao heat characters also do not act negatively towards others.[2]
It's an archetype that is on the completely opposite end from tsundere.[2]
Similar Archetypes
- Deredere: A term for an overly affectionate character who is lovestruck and does not hide their romantic feelings towards their love interest.
- Genkikko: A term for a character who is full of energy and is very cheerful.
- Megadere (Mega): A term for a character who has a strong adoration for their love interest and will not be afraid to give them large displays of affection and tell them how much they love them.
- Sunao Cool: A term for a character who expresses their love and affection honestly and straightforwardly, but is always cool in their behavior because of their calm and expressionless personality.
- Sunao Surreal: A term for a character who expresses their love and affection honestly and straightforwardly, but is seen as surreal because of their strange and unusual behavior.
- Uzadere: A term for a character who is normally very loud and likes annoying their love interest, but also has a cuter and more lovey-dovey deredere side.
- Yandere: A term for a character who at first is very sweet, loving, innocent, and overly affectionate like a normal deredere character, but over time begins exhibiting signs of being mentally sick as a result of having a too strong love.
List of Characters
Gallery
 Rae Taylor from I'm in Love with the Villainess  Rae Taylor from I'm in Love with the Villainess  Tohru from Kobayashi-san Chi no Maidragon  Tohru from Kobayashi-san Chi no Maidragon  Tohru from Kobayashi-san Chi no Maidragon  Tohru from Kobayashi-san Chi no Maidragon |
References
- ↑ 1.0 1.1 Dere Character Diagnosis. LastProject (2014/10/31). Archived on 2025/08/01. “Of the currently popular tsundere and its derived character attributes, we will diagnose which type you are by asking 15 questions. The results are "Tsundere", "Yandere", "Kuudere", "Sunao Cool", and "Sunao Heat", for a total of five types!!”
- ↑ 2.0 2.1 2.2 2.3 What is Sunao Heat. Pixiv Encyclopedia (2012/07/10). Archived on 2025/07/30. “Sunao heat is one of the moe attributes. It is a character who is passionate, especially about love. A type of character who expresses their thoughts honestly and passionately (often in a swelteringly hot manner). They can also be described as a character who is passionate about love. It is not similar to the "sunao cool" type, and is at the opposite end of the spectrum from tsundere. The directness and outburst of love is similar to that of yandere (however, yandere also include downer types, so not all yandere are heated).”
- ↑ List of Character Types and Classifications. Monogatari Movie (2021/06/29). Archived on 2023/06/04. “Sunao Heat: Hot-hearted personality. Heroine attribute.”
- ↑ Sunao Heat Chargers. Mixi (2006/08/09). Archived on 2025/07/30. “There were none, so I had to make one. In this topic, we are going to give the names of characters who are sunao heat...”