From the TMG project and discounting #2 because it wasn't around in the 1940s:

Tom: 

1. Blink a couple of times and then politely demand to know why they're poking him with a piece of candy.

3. Silently question their sanity; allowed he would be absolutely polite and ask, "What about them?"

4. Tom hasn't got an opinion on unicorns, because they don't make for terribly interesting reading.

5. Calmly explain that his family's all dead, and that you must be mistaken because Bellatrix doesn't turn twelve until September.

Bellatrix:

1. Disarm them before they can reach her, then spend the next few minutes verbally abusing them.

3. Startle and curse them instinctively, then giggle while they were moaning and pain.

4. Disgust.

5. Condescending stare and say that yes, she knows. 

Lucius:

1. Silently stare them down until they leave.

3. Silently stare them down with a faint sneer until they leave.

4. That joke wasn't even funny the first time, and it certainly isn't now.

5. Slow, sarcastic nod. 

Rabastan:

1. Steal the candy cane and eat it.

3. Say, "My friend has a story he can tell you about rabbits."

4. Ancient unicorn hunts. 

5. Yep. And Rabastan's making the cake. 

This is from my 19th-century steampunk (notreallybuttryingtobe) NaNovel from 2011.

Emilia

1. She'd wonder what the sticky red and white thing is. 

2. Ask what Club Penguin is and if she could go inside

3. Run away Like A Boss :P

4. Say that they seem nice

5. Nod then make sure that all the funeral arrangements are in order while trying not to cry

Madeleine (Emilia's older sister)

1. Attack them back until the attacker or she is down.

2. Say something sarcastic and rude about penguin people

3. Hit them then ask questions when they wake up

4. Say that unicorns are not real and are just a waste of time. 

5. Blink then walk away, plotting revenge

1. Use a spell to render the sticky weapon melted.

2. Say, "Sorry, what?" Then, when it is explained to her it's an online world, say, "Oh, we don't get the medieval internet on the castle's Royaleputers."

3. Think it was the elves coming for her.

4. Say, "I love unicorns.  My horse turns into a unicorn whenever we visit a magical part of the kingdom, and I love him.  Although, I think he may have said the horn gives him a headache."

5. Climb into her wallet to wish him a happy early birthday.

Annika:

1. Grab ahold of the candy cane and ask, "What is that thing?"

2. Club penguin does not exist in my story.

3. Tell them to be quiet or they're not going to be able to catch one.

4. Doesn't know, she never really thinks about unicorns.

5. Her dad is dead, so I'm picking her best friend. "Uhhhhh, is it really? I don't think I'm going to be able to get him anything."

Adeliah:

1. Having never seen a candy  cane, he stares at it rather curiously. It doesn't really look like a weapon...

3. Startle badly.

4. Probably the white horse his dad used to have?

5. Give them a weird look and edge slowly away. Because it's not.

Elyana-

1. Look blankly attacker for a minute then politely ask if they could please stop. Start swearing in Draconian after a few times of asking.

2. Another blank look, then, "Uh, are you okay? First you poked me with a sticky red thing and now you're asking me about magic birds that live in ice."

3. Jump, swear, get onto Xell and fly away.

4. Say, "Con Rilleyo, Twitterton, and Malum."

5. Look at them witheringly and say, "Really, I know when my own dragon's birthday is. Now get the drake out of here and stop bothering me, you son of a unicorn."

Muse

1. Scream and offer them a rousing ditty in exchange for their life, all the while stealing the candy cane.

2. Lie and say that they do in exchange for said asker's email.

3. Scream again and throw his lute in their face.

4. Ramble on while pickpocketing the person and leading them into a bog.

5. Perk up and steal his father's presents and cake.

Ilik Coope From my story, "The Academy" He's a sorcerer in-training.

Someone attacked them with a candy cane

Says, "Oh hey, thanks!" and steals the candy cane.

Someone asked if they play Club Penguin

"What's Cnub Menguin?"

Someone jumped out of a bush screaming "BUNNIES!!!!!!!"

"WHERE?! I'll get them! Don't worry you're safe with me!"

Someone asked what they think of when they think of unicorns

"I've never met one but they seem pretty wierd."

Someone reminded them that tomorrow is their dad's birthday. If dad is dead, any other family member. If any other family is dead, then best friend. If best friend is dead, any random acquaintance and your story has a lot of deaths in it.

Sister: Cara. "Don't you think I know that? We're twins!" Then he shakes his head and mumbles under his breath.

Ehlveen From my story, "Forbidden" She's a steampunk machanic prodegy.

Someone attacked them with a candy cane

Shoots them with steampunk harpoon.

Someone asked if they play Club Penguin.

Stare at them for a minute, slowly back away.

Someone jumped out of a bush screaming "BUNNIES!!!!!!!"

"Nonsense! No live rabbit has been seen by anyone except the deep space explorers!"

Someone asked what they think of when they think of unicorns

See answer for Club Penguin.

Someone reminded them that tomorrow is their dad's birthday. If dad is dead, any other family member. If any other family is dead, then best friend. If best friend is dead, any random acquaintance and your story has a lot of deaths in it.

Uh-oh... my charachter is a friendless orphan who doesn't care about anyone... O_O