YMMV / Hekikai no AiON

• Hollywood Pudgy: Nagisa apparently considers herself fat and she has taken summer diets that ultimately fail, but she isn't any more fat than the rest of the cast.
• Ho Yay: Tsukasa was meant to be gay for Tatsuya or at least was pointed to be, as seen in volume 2's omake. Though, now he's a wholesome fraternal figure to him, some can't stop seeing the Ho Yay between them. Even Minagi pointed it out once!
• Iron Woobie: Seine after killing her first mermaid; she stopped the crying for Simon's death and became an Action Girl Broken Bird and since then who knows how many things she has taken with a stoic face.
• Moe: Sheila. Woobie? Check. Cute Mute? Check. A little bit of lost and you can't avoid wanting to protect her? Damn check.
• They Wasted a Perfectly Good Plot: Shizuki's war against Demiurge, her identity as the goddess Pistis Sophia and the twins' past, as well as the question of whether Tatsuya's parents' deaths were really an accident or murder.
• Ugly Cute: Croquet, Tatsuya's dog.
• Viewer Gender Confusion: At first look, it's difficult to know that Bella is really a female mermaid.
• The Woobie:
  • Sheila. Her sisters are complete Jerkasses towards her.
  • Young Seine counts too. Her childhood before Simon was crap.