A lot of trios are very clear cut:
For instance: Sybil, Sam Vimes, Vetinari is clearly Shield, Sword, Emperor.
Newspaper Trio is William as Emperor, Otto as Sword, Sachsrissa as Shield.
But sometimes you get weird tricky shit like Moist as Dummy Emperor, Adora Belle/Spike as Sword, Mr Pump or Gladys (depending on the book) as shield, and Vetinari as Sleeper Emperor/True Emperor.
Or, out of Discworld, you get examples like:
-Hardison Emperor, Parker Sword, Elliot Shield (he should also be Sword, but he’s capable of being shield and neither of the others can) (Leverage)
-Tulio Emperor, Miguel Shield, Chel Sword (Road to El Dorado)
-Aisaka Emperor, Ryuji Shield, Minori Sword (Yuusuke as trap card, Ami as Princess—but the weirdest possible princess role. You’d think she’s trap card because she’s a dick and that Yusuke would be the princess. But her function is to force people into emotional maturity and Yusuke is all over the damn map).
-For the core members of The Forgotten, Itzal is Emperor, Nat is Shield, Heskan is Sword. However, when you add the secondary party members, Nat becomes Princess, Penna becomes Shield, Elwyn becomes Trap Card.
-As for shipping in The Forgotten: Norebo/Itzal/Wee Jas gives you Emperor Norebo, Sword Itzal, Shield Wee Has. Heskan is a nightmare because he’s the connective tissue in a lot of trios but is incapable of functioning as Emperor. You can have Emperor Itzal, Sword Heskan, Shield Reardon; or Emperor Moqul, Sword Heskan, Shield Reardon; or Emperor Itzal, Sword Heskan, Shield Kovan. Heskan can only be emperor if he’s working with characters even more functionally incapable of being emperor than he is (Emperor Heskan, Shield Nat, Sword Keth).
Anyway. Did you watch Code Geass at a key point in your development or are you normal?
Girlboss, Malewife, Manwhore is out; Emperor, Sword, Shield, is in