When writing a novel, how can a character be developed well, but QUICKLY?

After Eunice and I finished London Under Veil, I entered the first chapter in a contest at a convention where you could submit something and have it critiqued by a professional book agent.

“I’ll put the kettle on.”

“Damn straight. So get to it! This time next week, I want to hear some moans coming through that wall.”

What is the Abu Shusha massacre in Palestine?

“Thanks. You’re looking pretty ratty yourself. Have you been in that bathrobe all day?”

“Yuuna and the Haunted Hot Springs!” Claire turned the book around.

“Exactly.”

Are there any nude pictures of women with big tits?

“Exactly.”

May pushed Claire’s feet away. Claire rose to peer out the window. “Huh. It’s still there.”

Claire sat back down, legs tucked elegantly beneath her. “You are looking a bit sloppy,” she said, inspecting May through narrowed eyes.

10 Habits that are Aging Your Gut, According to Experts - EatingWell

“Well, maybe if you’d wear more clothes, they wouldn’t feel so cold. Hussy!”

Essentially, what you do is show the character:

May yelped. “Hey! Your feet are cold!”

I’m 17 and looking for a girl. What do I do?

“Perv.”

“No way.”

“They are! He broke the rules of the boarding house by petting this character while she was in cat form, so they invoke the ancient rules of single combat via ping-pong, and—”

How did you cope when someone you love, dealing with hyper-independence and trauma, felt they needed space to heal alone? Were you able to support them without overstepping, and did you eventually reconnect? How did that journey unfold?

“Nary a cute boy in sight.”

“You know what? Never mind,” May said. “I am way, way too drunk to be having this conversation.”

In the kitchen, Claire set out a battered pair of mugs: May’s black, with “PEBKAC: Problem Exists Between Keyboard and Chair” in white letters; Claire’s white, with “This must be Thursday. I never could get the hang of Thursdays” in dark blue. She carried both mugs into the living room. “A moggie followed you home? Is this some weird Internet slang I’m not current on?”

Deion Sanders: Pre-draft attacks on Shedeur and Shilo "hurt" - NBC Sports

Here’s how we presented the character Claire when she was introduced, which the agent particularly singled out:

“It’s not looking at you.”

“Cute girls?”

Liverpool FC parade crash injured rises to 109 - BBC

“I’m serious!” Claire said. “It’s staring straight at me.” She let the curtain fall. “Weird.”

“Why is that always your first suggestion? I do not need some tea. It’s three o’clock in the morning! If I have tea, I’ll never get to sleep.”

The agent had only one bad thing to say (the synopsis was crap; writing synopses is hard!), but praised the characterization and particularly how well we introduced a character’s personality quickly.

What qualities do single women typically look for in a man? Is it a common preference for women to want a man who earns more than they do?

“Claire, I—”

Engaging in conversation that also shows something about their intelligence, personality, wit (or lack thereof); and

“Claire! Why are you still up?”

How Can AI Researchers Save Energy? By Going Backward. - Quanta Magazine

“I’m just a fan of your catch and release program.”

May studied the black and white comic panels. “Oh, my. She looks…anatomically implausible. What is she doing to that poor man? Wait, are those cat ears?”

“Yes way. It’s washing itself under the street light. Uh-oh, I think it spotted me. It knows I’m watching it. I swear it’s looking at me.”

Screen time and physical activity habits linked to adolescent stress and depression - PsyPost

“I need to do laundry.”

“May! You’re home late! Early, I mean. Well, I mean, it’s early in the morning, but you’re home before I expected. Er, after. Before?”

“So you didn’t meet any cute boys at the club tonight?” Claire called as she bustled about the small kitchen.

Do people have to be a pastor to baptize?

“Well, maybe if you didn’t spend all day reading—” May prodded the book with its garishly-coloured cover with her foot. “Bizarre comic book porn…”

“None of those either. Look upon the wasteland that is my sex life, and see that it is barren. Naught but a moggie followed me home.”

Create a context between this character and other characters.

Did Obito ever fully redeem himself in everyone's eyes?

“Tart!”

“I don’t know. Partying. Going to a pub. Anything besides sitting on the couch reading…” She squinted. “What the hell are you reading?”

“I’m glad my sex life is so entertaining.”

Why are the democrats keep insisting that there are more than two genders?

“About wearing more clothes? How am I supposed to catch any fish if I don’t show off the bait?”

“From the look of you, if you try to sleep now, you’ll spend the next three hours hanging onto your bed trying to stop the world spinning. Since you’re not going to sleep anyway, you might as well keep me company.”

“No, about the cat. You don’t need a cat. You remember what happened to your spider plant, right?”

Sabrina Carpenter Shares New Song “Manchild”: Listen - Pitchfork

“Nope, I mean a cat followed me home. A black cat, to be exact. All the way from the club. Probably still out there, for all I know.”

“Yep!” Claire chirped. “There’s this schoolboy, see, and he’s homeless, so he lives in this boarding house that used to be a hot springs bathhouse, which is cheap because it’s haunted, so he decides—”

“It’s a cat. All cats are weird.” May sipped from her mug, inhaling the warmth. She closed her eyes. The room spun. She opened them again. “Ugh. I think I drank too much.”

Tom Aspinall wishes Jon Jones well in retirement, declares himself ‘undisputed’ UFC champion - MMA Fighting

“Hang on, are they playing ping-pong?”

“I know! That’s why I’m putting them under you!”

They both burst out laughing. “I’m right, though,” Claire went on.

“You don’t need a cat. You can’t take care of a cat. You can’t take care of a ficus.” Claire flopped on the other side of the sofa and wriggled her feet beneath May.

Doing something they enjoy, that expresses their personality, and that is in some way unusual or noteworthy;

“Fine.” May collapsed into the warm spot Claire had just vacated.

“I try not to, but thank you for reminding me. I know I don’t need a cat. I don’t want a cat. What would I do with a cat?”

“You need some tea!”

“Number one, it’s not porn, it’s ecchi, and number two, why would I waste a perfectly good Saturday doing anything else?” Claire pulled at her tea and sighed. “The only thing that could make this day better is if you'd come home with some cute boy, so that after you kicked him out tomorrow I could live vicariously through you.”

“But they’re cold!”

Claire, one of May’s three flatmates, former university roommate, and best friend in all the world, shrugged expansively. “It’s a Saturday night. What else would I be doing?”

Do that and you can ground your characters quite quickly.