Karen (Ebony Obsidian) and Sabrina (Novi Brown) didn’t “leave” Sistas for any publicly explained behind‑the‑scenes reason; what is known is that both actresses are not returning as series regulars in Season 10, and no official cause has been shared. On screen, the writers are using storylines (Karen moving away, Sabrina’s car crash) to write them out and introduce two new women into the core friend group.

Quick Scoop: What’s Going On?

  • BET and multiple entertainment outlets confirmed that Ebony Obsidian (Karen) and Novi Brown (Sabrina) will not be back as series regulars in Sistas Season 10.
  • Reports say there has been no official public reason (creative, contractual, or personal) given for either actress’s exit.
  • Fans are reacting strongly online because these two have been part of the show since Season 1 and were central to the “sister circle” dynamic.

On‑Screen Explanation vs Real Life

In the story (on screen)

  • Karen’s Season 9 finale included a farewell cookout that strongly suggested she is moving on and out of the main circle, setting up her absence in Season 10.
  • Sabrina’s fate is tied to a serious car crash cliffhanger in the Season 9 finale, with trailers and coverage heavily hinting she may not survive.
  • Season 10 brings in two new characters, Cheyenne and Madison, to fill the gap in the friend group.

Behind the scenes (real life)

  • Coverage from TV and entertainment news notes that Novi Brown is “officially exited,” but does not state whether it was her decision, the producers’, or mutual.
  • For Ebony Obsidian, it is confirmed she is not returning as a series regular, but outlets say it is still unclear if she might briefly appear to wrap up Karen’s story.
  • Representatives and the actresses themselves have not publicly given a detailed explanation, so anything beyond that (creative differences, scheduling, etc.) is fan speculation, not fact.

What Fans and Forums Are Saying

In fan spaces and forums, people are piecing together clues and making guesses, but these are unconfirmed :

  • Some think the exits are mainly creative decisions so the show can “reset” in Season 10 with new drama and new dynamics in the group.
  • Others believe the actresses might be focusing on new projects; for example, Novi Brown has been working on other creative ventures and called 2025 a “big year of transition” in her life.
  • A third camp is upset about the way the characters are written out, feeling Sabrina’s potential death and Karen being moved away are too abrupt after nine seasons.

Because there’s no detailed official explanation, the honest, up‑to‑date answer is:

They’re leaving the show as series regulars, but the specific “why” behind Ebony Obsidian and Novi Brown’s exits has not been made public.

What to Watch for Next

  • Season 10 (premiering early January 2026) is expected to confirm Sabrina’s fate and show how Karen’s move is addressed or referenced by the remaining characters.
  • Two new women, Cheyenne and Madison, will step into major roles in the friend group, which will likely shift the tone and focus of the show.
  • Entertainment outlets are watching closely; if BET, Tyler Perry, or the actresses share an in‑depth explanation later, that would be the first solid answer beyond current reporting.

Bottom note: Information gathered from public news and entertainment coverage plus online fan discussion, and may evolve as more official statements are released.