Tropes associated with Yoruichi:
Badass Action Girl
Retired Badass: Sorta.
Ambiguously Brown (Don't bring up her ethnicity unless you want a load of Fan Wank, trust us)
Bokukko
Broken Pedestal (For Soifon, sorta)
Cool Big Sis (Towards Ichigo and Soifon, to a degree)
Even The Girls Want Her (Between Soifon and the female fandom...)
Eyes Of Gold
Fallen Princess (Heiress to a powerful clan and Shinigami captain, abandoned everything to run away)
Flash Step (Her extreme speciality)
Les Yay: With Soifon.
Lightning Bruiser: She's not only the "Goddess of Flash", she has enough Super Strength to trounce Yammy Riyalgo, who is known for Super Strength even with his zanpakutou sealed. And we haven't gotten to her Shunkou mastery yet...
Ms Fanservice and Lovable Sex Maniac (She's very nudist, when it comes to human form. And LOVES teasing Ichigo about it)
Naked First Impression (To Ichigo who almost had a stroke upon seeing her human form for the first time...in the nude. Poor Ichigo.)
Ninja
Highly Visible Ninja: Slightly less visible than certain orange-cladded ninja
The Obi Wan (of Soifon)
Satsuki Yukino
Sexy Mentor (Slightly towards Ichigo)
Spoiled Sweet: Was this before running away, telling Soifon to not treat her with any formalities and even resting her head on her lap
Tall Dark And Bishoujo
Token Minority (Well, she is black, but we never know her origins)
Viewer Gender Confusion (Nobody expected that deep-voiced cat to turn into one gorgeous babe)
Waif Fu (according to the databook, she's 156cm (5ft 2in something) and 42kg (92 lb). And BOY she can pack some punch.
Wendee Lee
Zettai Ryouiki (Wears the thigh-high socks plus short bodysuit during her Big Damn Heroes moment in 403.)
Tropes associated with Soifon: Badass Action Girl Ninja (One of the most action-oriented ladies in Bleach)
Awesome But Impractical (Her opinion on her Bankai. It's too big and unweildey for an assasin, and the explosion is so large it's hard for her not to get caught up in it. She also tries not to use it more than once every three days because of the strain it puts on her.)
BFG (Her bankai is a goddamn bazooka! missile-launcher!)
Bodyguard Crush (For Yoruichi)
The Captain
Clingy Jealous Girl: Speculated to be the reasoning behind asking Hachi to imprison Urahara for a month in exchange for her help.
Covert Pervert (A literal example, being she is a Ninja.)
Deus Ex Nukina: Subverted, twice. She shoots two missiles at Baraggan. The first one he survives because he blows it up at range, the second one he survives because it simply wasn't enough to kill him.
Fan Nickname (Captain Bitchninja, for her Tsundere-ness)
Banzooka: Her bankai.
Handicapped Badass (When Baraggan's power pretty much trashed her arm, she had Omaeda cut it off)
I Am Not Left Handed: Has a Friggin' Missile Launcher for her Bankai. "Too large to conceal, too heavy to move, and its attack, is too flashy, for assassination." BOOM
Jerkass Facade (...is an Ice Queen bitch to her subordinates to keep them always alert)
Karen Strassman
Kick The Dog: Like Byakuya, she had quite a few dick moves in the Soul Society arc, to the point she occasionally bordered on sadism.
Lightning Bruiser (Her main strength is her blinding speed, but a person who can kill with two attacks isn't exactly fragile. Factor in her Shunkou technique...)
Never Got To Say Goodbye (To Yoruichi, when she became a Fallen Princess. And boy, is she upset because of that)
Pettanko (According to sources, she surprisingly has SMALL ones)
Running Gag (Obsession with either Yoruichi, or black cats)
Single Target Sexuality:
"Oh Yoruichi-sama!"
Small Girl Big Gun (In bankai mode only.)
Spell My Name With An S (Her name was first translated to be Soi Fong, which sounded Chinese since she looks Chinese.)
The Other Darrin (Her default seiyuu is Tomoko Kawakami. But she's currently taking a sick leave, so she's now voiced by Houko Kuwashima)
Touch Of Death (Suzumebachi's speciality)
Tsundere (Les Yay, Type A (more tsuntsun) version: she may be hard and cold, but is Yoruichi's nº1 fangirl)