Which entity is this text about?

The Bella Twins are a professional wrestling tag team who perform on WWE and consist of real-life twin sisters Brie Bella and Nikki Bella. They are both former Divas Champions, with Nikki having held the divas championship for 301 days, being the longest reigning Divas Champion in WWE history. In November 2015, Nikki was ranked No. 1 in Pro Wrestling Illustrated's Female 50 in 2015. Brie announced that she was taking an extended break from in-ring action in April 2016, therefore disbanding the tag team.

Nikki received her title match against AJ Lee on November 23 at Survivor Series, which she won, with Brie's help, to become a two-time Divas Champion. This led to the duo reuniting as a result. Nikki then went on to retain her championship in three separate occasions - against Lee in a rematch on December 14, at TLC: Tables, Ladders and Chairs, against Naomi two days later on SmackDown and against Paige at Fastlane on February 22, 2015. Paige and Lee then formed an alliance against Bellas which led to a tag team match at WrestleMania 31, where Lee and Paige were victorious.  On April 26, after Nikki retained her title over Naomi at Extreme Rules, a feud started, with Naomi aligning with the returning Tamina to even the odds against Bellas, who began showing more heroic characteristics. This change in character was criticized as "sudden", "randomly" and "for no reason". This led to a tag team match between the two teams on May 17, at Payback, which Naomi and Tamina won. Two weeks later at Elimination Chamber, Nikki retained her title against Naomi and Paige in a triple threat match, with Brie banned from ringside.  In June, The Bella Twins became villainess once again by employing Twin Magic, which helped Nikki retain the title against Paige on the June 1 episode of Raw and at Money in the Bank. During the feud with Paige, Alicia Fox allied with them to form Team Bella. At The Beast in the East on July 4, Nikki retained the title against Paige and Tamina. After weeks of Team Bella outnumbering Paige, Naomi, and Tamina, Stephanie McMahon called for a "revolution" in the WWE Divas division and introduced the debuting Charlotte and Becky Lynch as Paige's allies, while NXT Women's Champion Sasha Banks debuted as an ally to Naomi and Tamina, which led to a brawl between the three teams. Nikki then lost to Charlotte in a tag team match on the August 3 episode of Raw, and to Banks on the August 17 episode of Raw in a non-title match. The three teams faced off on August 23 at SummerSlam in a three team elimination match, in which Team Bella first eliminated Team B.A.D. before Team PCB's win.  On the September 14 episode of Raw, Nikki defended her title against Charlotte, who pinned Brie after the twins had switched places to win the match; however, since the title cannot change hands by disqualification, Nikki retained the championship, and in the process, became the new longest reigning Divas Champion in history, surpassing AJ Lee's previous record of 295 days.

Entity:
The Bella Twins