Kaigaku Inadama - Blog Posts

The parallels between the Thunder siblings and the Tsugikuni twins run deep. Starting with Kaigaku and Michikatsu's memories, it's evident that there is no strict rule about demons retaining their memories after transformation. I believe it mainly concerns their corruption. When demons' memories are taken away, a fundamental part of them is erased, which makes it easier for Muzan to reshape their relationships and identities to serve him. In the case of these two, remembering is essential; Muzan needs them to hold onto their worst qualities and instincts. Hatred and jealousy are powerful, binding emotions that drive both of them. Muzan's strategy is to keep them as their worst versions, which is why I believe these two kept their memories despite being transformed. this similarity is also the undeniable reason why Kokushibo was Kaigaku's path into demonhood.

As for the other two, aside from Tanjiro, I think Zenitsu is the closest to Yoriichi among the Kamaboko squad. They’re both really hard on themselves. Even though they’re clearly talented, strong, and heroic, they can’t seem to accept it. Zenitsu sees himself as a coward who doesn’t amount to much, while Yoriichi feels like a failure. But both have a lot of kindness, bravery, and care for others.

Both also fight their turned demon siblings, and the saddest part is that they both "die" when they "kill" their brothers. Yoriichi's heart stops at that moment, and Zenitsu falls to his death without trying to stop himself, and almost crosses to the other side. It's as if the act itself was so painful. They understood they had to end their siblings' lives, but despite any anger, disappointment, or pity they felt, there was no triumph in their actions, only heartbreak.