Kim K Back in Bianca's Orbit for Kanye's Rolling Loud Set to Support North

Kim Kardashian and Bianca Censori were once again in the same space -- as they both descended upon Kanye West's Rolling Loud set ... where young North was in the mix.

The Kardashian-West family was looking very blended and kumbaya Thursday evening, where Ye and co. were scheduled to perform at the L.A. music festival ... and where North was also set to do her thing for the 'Vultures' song she's on with her dad, called "Talking."

Just like a few days ago in San Francisco -- Kim was there for North ... rolling into the event in an SUV, where she was riding passenger ... similar to how Bianca arrived in her own car.

There's no visual evidence thus far that Kim was standing next to BC the way she was on Tuesday for the SF listening event -- where they were shoulder-to-shoulder -- but there's no doubt they were within reach of one another ... as they obviously had backstage access.

Speaking of North, she was getting the A-list treatment the whole night -- shaking hands with fans of hers (yes, including adults) with her entourage of friends behind her.

There's another video that shows North seemingly doing an interview with someone behind the scenes -- and as she's answering questions ... you can see Kim looking on not too far away. So yes, Mama Bear is keeping a watchful eye over her and Kanye's daughter.

Obviously, Ye himself is deeply invested in North right now -- she recently announced she has her own album coming out ("Elementary School Dropout") ... and we've heard she's hard at work in the studio with Kanye guiding her. Sounds like they're all taking it seriously.

It's interesting that Kim continues to show up for her daughter -- ya gotta figure she might feel somewhat conflicted over all this ... on account of Kanye's many controversies.

Despite that, however, she's out here backing up North -- and in doing so, she's rubbing shoulders with Bianca -- who's now the stepmother of all her children with Ye. There's no indication there's any bad blood between Kim and Bianca ... on its face, they're civil.

One thing we know for certain, though ... Kim definitely isn't as bold a dresser as Bianca -- and we're sure she wants to keep it that way. BC's been in some pretty wild outfits lately.

In any case ... KK and Bianca showing up near each other is becoming a regular thing -- and with North diving into music ... that's probably their reality for the foreseeable future.