Actress sister here will of course fail at this acting job because she doesn't have her perfect materials to act to. And has landed a job with a director who is the harsh kind who wants actors to think for themselves instead of following orders. So she runs out in anger/shame and causes massive filming delays because she doesn't just some out and say she can't for several days, which is a huge waste of money as people show up to do film stuff but can't because she's nowhere to be found.
Next to the table is the Model sister. Without our boy around she believes she can eat whatever she wants now without following his meal plan, she never got fat even when she ate sweets and stuff so clearly she can go hog wild! Of course she gains weight enough that it's a problem and they have to digitally edit her shots a lot to cover up. But then her fashion group gets into a fashion group challenge which involves our boy and his ever-increasing orbit of girls. Screws it up in multiple ways! Claims to design her group's clothes. She doesn't, and the designer she hires ends up stealing and using draft versions of what our boy was making for his group. Then of course she has to appear ON STAGE LIVE IN OUTFIT, which fits her horribly since y'know got that fat on her now. Reception afterwards is very cold due to 'got fat, people checking previous stuff and finding evidence of alteration' and 'doesn't actually design clothes and guy ripped off from someone else (the boy's girls model his finished versions wonderfully, of course.)'
The next two are actually positive! SHOCKING!
The youtuber (not a vtuber like Himeji, she streams as herself) ends up facing Himeji as Kaguya in not-smash and loses. Then through twists and turns afterwards when she re-challenges her after we find out she totally loves big brother. If you look back at chapter 1 you can see her comments are basically 'this isn't funny at all' and 'please leave this horrible place and don't look back.'
The singer is next-ish? It's sorta a combo. See during the fashion group challenge and the vtuber vs youtuber challenge our boy did music work as V the composer (y'know one of his many talents.) After hearing that and hearing that youtuber sister next door to her is leaving home (managed to get a perfect exit contract signed by the overworked at this point Mother who is drowning in dealing with problems, and she's also mostly fine with it because she's weirdly old-school and believes internet work is worhtless.) Singer sister also leaves with Youtuber sister and they end up crashing at our boy's place. Once she realizes that he is V, the composer who did amazing music work for her, she's totally into him, since she's mostly detached from everything else (see her reaction in chapter 1 of '...' and 'I'm hungry' instead of berating him like the rest.)
And uh that's it, really. The other two sisters (multi-talented and voice actress) have not shown up in the WN. The WN also has stalled out to do LN/manga work. Leaves off in the middle of an arc in which Idol sister comes off suspension and decides to challenge Asterisk, which is probably not going to end up well for her. At all. She went after Kuon saying she's physically weak and a late joiner so she's awful, but our boy has been her personal trainer for a bit before this so...
