Tachibana Music served as the producer for Magni, Vesper, and Bettel, overseeing their covers and Magni's original song "Copium."
Tachibana Music established connections within the left/progressive community, including VTs, GameDevs, and journalists. This networking led to a producer-collaboration with Fukutachi Mana, who holds extreme left-leaning views.
Privately, Tachibana engaged in concerning online behavior, demonstrating harmful tendencies and engaging with incel and chan culture. This behavior included manipulating contacts to gather sensitive information such as addresses, workplace details, and VT-related data, which was later exploited for manipulation, blackmail, or doxxing on platforms like 4chan.
The extent of these actions came to light during a hate campaign orchestrated by Tachibana against former collaborator Fukutachi Mana, stemming from her extreme views on Ukraine. Fukutachi Mana reached out to individuals who had been previously victimized by Tachibana, as well as others with relevant information.
The initial Tachibana Dossier documented discord conversations containing threats, evidence of financial fraud, and a wide range of personal and professional information, including addresses, work details, and NDA-bound data of corporate Vtubers like Magni, Vesper, and Selen. This comprehensive dossier was submitted to the relevant corporations, including Cover and AnyColor.
The original public dossier was subsequently removed by its creators, presumably in preparation for legal action due to the severe risks posed to individuals and financial losses incurred. While a lengthy 10-hour video containing the dossier contents remains on YouTube, its length makes it challenging to watch.