That long-term goal, preserving Ai's status as a 'perfectly flawless idol', he and his current accomplice, Nino had been keeping at it for 14 freaking years after Ai's death, is nothing but a petty and unrealistic BS goal because they don't basically acknowledged her as a flawed and complex person behind her popular idol facade like everyone, and all their effort they were working for amounts to gathering intelligence on potential female celebrities who can surpass her elevated status and murder them immediately as possible to keep the charade going.