Fěnsī men dōu hěn xiǎng jiàndào zhèwèi xūnǐ zhǔbō de běntǐ.
The fans really want to meet the real person behind this VTuber.
Tips
history
In Kantian philosophy 本体 is the standard translation of 'noumenon' - the unknowable 'thing-in-itself' opposed to 现象 (phenomenon). The everyday Chinese sense ('main part, the thing itself') predates this loan.
usage
Modern internet usage: VTuber and virtual-idol fans use 本体 to mean 'the real human animating the avatar.' E.g. 找本体 = 'figure out who the real person is.'
