Fun fact: The name "Kunikuzushi" is given by himself. When Ei created him, she never named him. Seeing that the puppet has emotions, Ei released him to the wild, to be free and enjoy life as he see fit. He was found by Katsuragi who brought him to Tatarasuna, and was 'adopted'. At the time, he never gave himself a name, and everyone just refer to him as 'Kabukimono', which is an eccentric word for 'peculiar person'. He accepted the name and became Kabukimono until the Tatarasuna Incident. After the incident, he left Tatarasuna and met a boy. However, not long after, the boy died and Kabukimono was left alone once again. That is until some time later, the Jester, aka Pierro, found him and recruited him. Seeing him as a potential asset, Dottore recruited him into his experiments, calling Kabukimono as Scaramouche. Kabukimono accepted this new identity. Scaramouche accepted Dottore's offer to become his main asset, in exchange for Dottore unlocking Scaramouche's true powers, whom were sealed away by Ei when she released him. At the time, the Tsaritsa gave orders to Scaramouche to lead an expedition into the Abyss, because of his endurance as a non-living puppet. When his true powers were unlocked, he was a match with the lower-ranked Fatuis, and was put on a stand-by order by the Tsaritsa. Eventually, he was activated as an asset and worked behind the scenes. Because of his high endurance, he was named the sixth of the harbingers. During his time as a Fatui Harbinger, he once went to Inazuma to enact his revenge on his betrayal by his friend, Niwa. He killed many blacksmiths related to the Raiden Gokaden, and named himself Kunikuzushi to blend in. So in conclusion, Ei never gave him a name, let alone the name Kunikuzushi. During his time as a Fatui, he once went on a personal endeavor in Inazuma and gave himself the name Kunikuzushi to blend in.
I wanted to bring to your attention that I came across a RU-vid channel called "PanchouS" that has posted a video very similar to the one you created, specifically this video. I'm not sure if they had permission to use your content but I figured they didn't. Additionally, it seems like this channel may have a history of using content from other gachaTubers without permission, as their videos feature different gacha character styles. I just wanted to make you aware of this situation. As I clearly remember watching your video a year ago, and I accidentally pressed their video and was shocked on how recently the video was posted.