First, regarding the male betta’s aggression: Male bettas are fiercely territorial, rigorously defending their space in the wild. This aggression is mostly directed at other males: upon spotting a rival, they chase intensely, flare their fins in intimidation, and sometimes engage in fights that can prove fatal. This behavior is an evolutionary adaptation for securing resources like food and habitar, as well as competing for access to females. In captivity, this trait can become problematic, leading them to attack not only other males but even their own reflection in a mirror. Males are also turn aggressive toward females, especially outside of breeding seasons or interterritorial disputes, where they might chase, bite, or try to drive her away. It’s naturally advised to avoid keeping males and females in the same tank exceptional at breeding, as reports show females suffering injuries or death due to male predation. This aggressiveness is heavily influence…
MIZISUA BATH SCENE?SAKI TENMA CARD?
Everybody's made the connection between Quilt being a male betta and the species' violent behavior during mating being all over the lyrics, though I can't help but feel there's a certain level of irony being invoked, particularly whenever he's associated with female imagery. His androgynous design, the song using あたし as his first person pronoun, having him talk about himself "birthing" love, him looking up at the bubble nest at instead of being the one to protect it. The dead male betta paralleling the supposedly dead figure (face obscured, legs spread) also points to the idea of him not coming out on top in the end.
P.S. This isn't anything conclusive but I still wanted to add this observation: The frame at with The Owner/Devil's hand and Quilt's in parallel with each other as Quilt opens his eyes in the background depicts the moment he became human, but it also seems evocative of this idea that, after mating, nothing good awaits the female betta when she wakes up after being mounted to the point of exhaustion. The Devil's long nails even feel reminiscent of a male king crowntail's fins (Quilt's species).
人間になって好きな人を食べちゃったのかな、最初の顔が三日月みたいな奴が悪魔で 人間になった時？
右下のイラストの水晶まじで魚卵みたいで見てたのともしかしてこれ女の人ご飯（稚魚）がいつ生まれないかかとか監視してる説ありだぞ。他の人がコメントしてるようにベタって共喰いとかするらしいし
の動いて出てきてるのが赤ちゃん...?なのかな、と考察しました。
〜
おそらくこの女の子は、"愛(赤ちゃん)を産む"って言ってるから、betta(共食い)、自分の産んだ赤ちゃんを食べる、これが無いと生きていけない、 の"紅く満ちるわ"や
これは闘魚（ベタ）だわ…うん
「愛じゃ私はもう息ができない」なのか「愛が呼吸できなくなった（愛が死んだ）」のどちらなんだろってめっちゃ考えてしまった
