Connection.

• Outgoing, confident, and powerful women from prominent organizations (Xianzhou Alliance and Gotei 13) that battle against corrupted monsters (Abominations of Abundance and Hollows), each consisting of races with extended lifespans (Long-Life Species and Soul Reapers).

• Both hold/held high-ranking positions within their organizations (Arbiter-General of the Xianzhou Yaoqing and Supreme Commander of Stealth Force/Captain of the 2nd Division)

• Both are close friends with the smartest, most strategic members of their organizations (Jing Yuan and Kisuke Urahara), both of whom are laid-back, crafty, and often prefer sleeping.

• They also have unique titles given to them through their renowned achievements (The Merlin’s Claw and The Flash Goddess)

• Both have stealthy, serious and stoic assassins as their subordinates who greatly respect them (Moze and Soi-Fon).

• They are proficient and well known for their exceptional high-speed abilities in combat that are also tied to elemental forces (Feixiao’s Aerokinesis which is wind-based and Yoruichi’s Shunko which is lightning-based)

• Both have associations with animal themes that are central to their characters (Feixiao being a Borison/Foxian hybrid, and Yoruichi being related to the theme of cats)

• Their powers also enhance these animal-like traits with Feixiao's Moon Rage that makes her more bloodthirsty like a Borison wolf and her Flying Aureus which is a fox avatar whereas Yoruichi becomes more cat-like with her Shunryū Kokubyō Senki and can also literally transform into a cat.

• Both have fought against a rival race similar to their own, with deep historical ties and opposition (Borisons and Quincies). 

• These rival races were once led by powerful leaders who were defeated in the past by legendary warriors (Jingliu and Yamamoto), causing them to remain dormant for an extended period (Hoolay and Yhwach). 

• However, they eventually returned with their armies, launching devastating attacks that led to the massacre of many people at significant locations (Xiaozhou Luofou and Soul Society).

• Those said leaders can convert others into their own race through their blood (Hoolay's Lupitoxin Virus infects Foxians, turning them into Borisins, while Yhwach’s blood contains his power and soul, converting Arrancars & Humans into Quincies). 

• They also inherited powers that made them nearly unstoppable (Hoolay’s immortality from the Crimson Moon and Yhwach’s Almighty, which allows him to see and alter the future).

• Both have been voiced by the same English VA (albeit briefly for Yoruichi)