In the books Tonks was an only child, but we’re sure there are a few folks out there who wouldn’t mind her as a cool big sister. Here’s why.

She gave the Order of the Phoenix a bit of style

Nymphadora, sorry, Tonks, entered the Harry Potter books as a young, rogueish punk with bright pink hair. Call us old squares, but it was a pretty cool entrance. Already an Auror, the Metamorphmagus wasn’t afraid of goofing around, either, which made her even cooler. It’s tough joining forces to take on Lord Voldemort, but Tonks managed to do it with aplomb.

She’d always stick up for you

‘If you shout his name I will curse you into oblivion,’ muttered Tonks menacingly.

Harry Potter and the Order of the Phoenix

A good sister stands up for her younger siblings and keeps them safe. When someone hurts them, that’s the cue for big sis to jump in, all wands a-blazing.

Tonks would have no trouble in that department. Don’t let her cheerful nature fool you – she could be pretty scary when she needed to be. As a trained Auror, battling Dark wizards was just another day at the office and she had hexes and jinxes to make your head spin (possibly literally, who knows?).

If Tonks was your sister, you’d pity the person who nicked your lunch money… not that anyone would dare to mess with you in the first place.

She’d cheer you up if you’d had a bad day

Imagine you’ve had an absolutely rotten day. You’ve got the weight of the world on your shoulders and feel like nobody’s on your side. What would Tonks do if she saw you like that? Like any caring Hufflepuff, she’d be kind and supportive and let you talk it all out over a nice warm mug of tea (thanks to Molly Weasley, Tonks really appreciated the value of tea and sympathy). After that, she’d probably pull funny faces until she made you laugh again – she was good at that.

But what if, instead of a broken heart, you’d broken a nose or a toe? No worries – Tonks could sort that out, too.

‘Episkey,’ said Tonks.
Harry’s nose felt very hot, and then very cold. He raised a hand and felt it gingerly. It seemed to be mended.

Harry Potter and the Half-Blood Prince

She’d bring out your rebellious streak

‘My Head of House said I lacked certain necessary qualities.’
‘Like what?’ said Ginny, who was choosing a baked potato.
‘Like the ability to behave myself,’ said Tonks.

Harry Potter and the Order of the Phoenix

Tonks knew that some rules were made to be broken. Growing up with her, you’d get in enough hijinks to make Fred and George Weasley proud. But remember, you’d have to be extra careful while making mischief. Sneaking out of the house for a few cheeky Butterbeers would be fun, but sneaking back in might be a problem…

CRASH.
‘Tonks!’ cried Mrs Weasley in exasperation, turning to look behind her.
‘I’m sorry!’ wailed Tonks, who was lying flat on the floor. ‘It’s that stupid umbrella stand, that’s the second time I’ve tripped over –’

Harry Potter and the Order of the Phoenix

Did we mention Tonks was a bit of a klutz? Oh well, nobody’s perfect. Speaking of which…

She’d accept you for who you were

Maybe you’re not the cleverest. Maybe you’re a bit of a loser. Maybe you happen to be a fully-fledged werewolf and people consider you a danger to their loved ones. Would Tonks treat you any differently? Of course not! She was wise enough to know it’s what’s inside that counts and she was a pretty good judge of character.

‘You see!�� said a strained voice. Tonks was glaring at Lupin. ‘She still wants to marry him, even though he’s been bitten! She doesn’t care!’
‘It’s different,’ said Lupin, barely moving his lips and looking suddenly tense. ‘Bill will not be a full werewolf. The cases are completely –’
‘But I don’t care either, I don’t care!’ said Tonks, seizing the front of Lupin’s robes and shaking them. ‘I’ve told you a million times …’

Harry Potter and the Half-Blood Prince

As an added bonus you’d get a smart, caring brother-in-law who always had chocolate. But best of all…

Maybe you’d be a Metamorphmagus

‘You know, I don’t think violet’s really my colour,’ she said pensively, tugging at a lock of spiky hair. ‘D’you think it makes me look a bit peaky?’
‘Er –’ said Harry, looking up at her over the top of Quidditch Teams of Britain and Ireland.
‘Yeah, it does,’ said Tonks decisively. She screwed up her eyes in a strained expression as though she was struggling to remember something. A second later, her hair had turned bubble-gum pink.

Harry Potter and the Order of the Phoenix

A Metamorphmagus – someone able to change appearance at will – is ‘born, not made’. Tonks passed the ability to little Teddy Remus, so we know it must run in families.

Picture this: it’s Friday night, you and Tonks are ready to party, but you’re having a bad hair day and need to be out the door in seconds. Not a problem. Just scrunch up your face and, bam: instant beehives/mohawks/whatever does it for you.

Not only do you look fab, you’re also a master of disguise. Suppose you’re at a gig (Tonks is bound to know where the cool bands are playing) but there’s someone in the crowd you really want to avoid talking to. Simple – just change your face and walk right on past them.

With Tonks you’d have a sister who’s cool, kind and fun. Together you’d be ready to paint the town red. Or turquoise. Or bubble-gum pink.