Shopping's hard, let's go mathing

This puzzle ties in to a very noticeable nuclear-physics-and-fruit-themed Week 5 class proposal:

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🍒 Nuclear 🍒 physics 🍒 via 🍒 fruit 🍒 puzzles 🍒 (Team KEN (Kevin 🍈 Eric 🍈 Narmada), 1-4 days)

Math is hard, let's go shopping! Shopping for 🍉 fruit 🍉, that is. You may have seen 🍉 fruit 🍉 puzzles online that look deceptively simple, but turn out to be related to algebraic geometry. Did you know that many other advanced topics can be formulated in terms of 🍉 fruit 🍉? 🍉 Fruit 🍉 is everything. Physics is just 🍉 fruit 🍉.

In this class, we'll cover several different applications of fruit to nuclear physics:

• 🍇 Quantum 🍇 chromodynamics 🍇 with red, green, and blue 🍇 grapes 🍇 (okay, maybe 🍇 grapes 🍇 are more purple than blue).
• 🍊 Atomic 🍊 hybridization 🍊: did you know that besides modern examples like the 🍊🍊🍊🍊 tangelo 🍊🍊🍊🍊, more classical fruit like many kinds of 🍏🍏 apples 🍎 are also the result of hybridization?
• 🍋 Nuclear 🍋 fusion 🍋: what fruit does it taste like if you blend a bunch of 🍋 fruit 🍋?
• The splitting of the atom via 🍌 banana 🍌 splits.
• The plum pudding model of the atom 🥝 (sure, that's a kiwi, but it looks sort of like an atom).

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The blurb itself also has a few references to Barbie ("Math is hard, let's go shopping", and a play on the movie's tagline "She's everything. He's just Ken."), so this is the great Barbenheimer-Week-5-Puzzlehunt crossover.

Every actor listed in the puzzle itself plays a role in the Oppenheimer movie whose profession matches one of the Barbie variants in the Barbie movie, with three exceptions specified by Barbie herself. (It would be too much to hope that there were a canonically Weird or Mermaid role in the Oppenheimer movie, sadly.) Take the actresses for the corresponding Barbie variants in the order the fruit emoji appear in the Week 5 class blurb, and index into the actress names by that emoji's count:

Actor	Role	Occupation	Corresponding Barbie actress	Fruit	Count	Letter
John Cena	Kenmaid	a MERMAID version of Ken in the Barbie movie rather than Oppenheimer (as noted by Barbie)	DUALIPA	🍒	6	P
Tony Goldwyn	Gordon Gray	an official who once owned newspapers (as noted by Barbie), making him somewhat of a JOURNALIST	RITUARYA	🍈	2	I
Harry Groener	Gale W. McGee	a senator and ambassador, making him a DIPLOMAT	NICOLACOUGHLAN	🍉	10	G
Gary Oldman	Harry S. Truman	the 33rd PRESIDENT of the United States	ISSARAE	🍇	7	E
Jack Quaid	Richard Feynman	a WEIRD guy (as noted by Barbie, who doesn't care he's a physicist)	KATEMCKINNON	🍊	11	O
Jason Clarke	Roger Robb	a circuit JUDGE	ANACRUZKAYNE	🍏	2	N
Florence Pugh	Jean Tatlock	a psychiatrist and physician, making her more of a standard DOCTOR than just having a doctorate (like most of the characters in Oppenheimer)	HARINEF	🍎	1	H
David Dastmalchian	William L. Borden	a LAWYER	SHARONROONEY	🍋	5	O
Jefferson Hall	Haakon Chevalier	a WRITER and professor of French literature	ALEXANDRASHIPP	🍌	2	L
Cillian Murphy	J. Robert Oppenheimer	a PHYSICIST (duh)	EMMAMACKEY	🥝	1	E

The answer is therefore PIGEONHOLE.