In his defence
He is young empreror
If he kept defending her people will say he's immature and that she is manipulating him
As well as the fact that currently he doesn't has much power, tgatss why they don't let him study well and stuff so he doesn't get any merit as the emperor and gain recognition and power. He is having it tough that kid
It would be worse if he defended her or accused someone cz right now the other bitch has fabricated evidence against her, and the emperor as well and if he tried something she will make it as if he is acting like a 'formerly commoner child who has power for the first time and is abusing it'
I feel bad for him
And fir her as well, since she isn't of the past emperors blood, she is regarded in a much lower position than anybody else and is hardly holding her ground with her the blood she shares with the emperor, so she needs to not cause trouble for him (as not involve him in her business or he involves her in his business so she is not put at a disadvantage)
Tough life really
BRUH WHATS UR BROTHER DOING KANXJD HES THE EMPEROR AND UR SISTERS IN TROUBLE WYA WTF and even if u deny u don’t care abt her U OBV DO IVE SEEN U ACT CERTAIN WAYS U DO CARE SO DO SMTHN , BE STRONG