This is old news, but since it has come up in a few threads on AHS, I thought it'd be good to have a general spot for reference. Timmy joined Ayu's troupe almost a decade ago, and made the decision to leave sometime in September 2020. After deactivating his social media for a while, he returned online acknowledging that it was time for a new start for himself. He has unfollowed Ayu, her team, and any Ayu fans he was following before, which can easily be seen as him putting space between these two chapters of his life.
Ayu herself made a statement via a TA post on the 11th October, after fans noticing his absence from Saigo no Trouble FINAL sent in questions. Here is the translated excerpt:
And one more thing about Timmy, he left for private reasons, so I will not make a statement about this on his behalf. Right now, I just hope he spends his time calmly, and I hope everyone will watch over him gently without looking into this too much.
Regardless of your opinions on Timmy, him leaving, and what he contributed to Ayu's career - please do not harass him on social media. That includes DMing him about Ayu or replying to his posts asking about the situation. If he wants to talk about it, he'll choose his own time and place in the future. For now let us give him the space he and Ayu both wanted him to have from the fandom and his previous job position.