Imo, the Most Memorable STRONG & SMART & BRAVE female leads: The Best of the Best is Se-Ryung in The Princess' Man.
Also, Mishil in Queen Seon Duk ..... empress in Empress Ki .... Guk-Ja (Strong yet gentle) and Ji-Hyun (No victim) in East of Eden ....
Jin Yue in Sound of the Desert ..... Xue Wu in Prince of Lan Ling ... Zhen Huan in Legend of Concubine Zhen Huan ... (I'm sure there's more)
Strong, Brave, but not always smart (too stubborn): Shan-Cai in Meteor Garden
SELFISH: ... selfish and audience didn't like her much, Mi Do in When a Man Loves .... Barbie Hsu's character in Summer's Desire , she Loved & dated both male leads (Peter Ho & Huang Xiao-Ming) yet she manipulated them to get what she wants ... true Triangle, u don't know who she'll pick until the very end!
Movie: Gianna Jeon in My Sassy Girl