In 2018, Mizuki, along with Sakazaki formed a team named "Magical Sugar Rabbits". The two faced each other again on June 9 in the Tokyo Princess Cup, where Mizuki lost to Sakazaki in the first round.[5] On August 25, 2018, Magical Sugar Rabbits defeated Ito and
Reika Saiki to win the vacant Princess Tag Team Championship.[6] Magical Sugar Rabbits had their first successful title defense on October 8, when they defeated Bakuretsu Sisters (
Nodoka Tenma and
Yuki Aino).[7]
On June 8, 2019, Magical Sugar Rabbits lost the Princess Tag Team Championship to Neo Biishiki-gun (
Misao and
Saki Akai), ending their reign at 287 days with 6 successful title defenses.[8] On July 7, Mizuki won the Tokyo Princess Cup after defeating
Yuna Manase in the finals.[9] After winning the Tokyo Princess Cup, Mizuki challenged Nakajima, who was then the Princess of Princess Champion, on September 1, but was unsuccessful.[10]
On August 29, 2020, Mizuki won the Tokyo Princess Cup for the second year in a row after defeating Nakajima in the finals, making her the only wrestler to win the Cup back-to-back.[11] On November 7, at the main event of Wrestle Princess, Mizuki challenged her own tag team partner Sakazaki for the Princess of Princess Championship, but was unsuccessful.[12] On November 14, Mizuki officially signed to TJPW.[13] On October 9, 2021, at TJPW's Wrestle Princess II, Mizuki and Sakazaki defeated Neo Biishiki-gun (
Mei Saint-Michel and
Sakisama) to win the Princess Tag Team Championship for their second time as a team.[14] On July 9, 2022, at TJPW's Summer Sun Princess, Mizuki and Sakazaki lost their tag titles to Saki Akai and
Yuki Arai, ending their reign at 273 days.[15]
On March 18, 2023, at Grand Princess '23, Mizuki defeated Sakazaki to win the Princess of Princess Championship for the first time.[16] Thirteen days later, at TJPW Live in
Los Angeles, Mizuki teamed with Sakazaki to defeat 121000000 (Maki Itoh and
Miyu Yamashita) to win the Princess Tag Team Championship for a third time.[17] On April 15, at TJPW's Stand Alone, Mizuki had her first successful Princess of Princess Championship defense after submitting
Nao Kakuta.[18] On June 9, Mizuki vacated the tag titles after Sakazaki was diagnosed with a neck injury.[19] On October 9, at
Wrestle Princess IV, Mizuki lost the Princess of Princess Championship to Miyu Yamashita, ending her reign at 205 days.[20]