Perfectly

You grin under your Invisibility Cloak as you see Fleur walk into the clearing and look around confused.

"H-hi Fleur..." You stammer. Fleur jumps as she hears your magically altered voice that sounded both older and shyer, with you throwing in a stammer for good measure.

"Where are you?" She asks, her French accent sending shivers of anticipation down your spine.

"I-if you d-don't mind... I'd rather stay like this. It will m-make this easier." You replied.

Fleur narrowed her eyes as her wand flicked into her hand. "Why did you bring me here?" She asked dangerously.

"T-to help... I k-know what the F-first Task is going to b-be, and I m-might have a way to h-help." You pause as if trying to build courage. "I'm a Seventh Year studying Runes and I have invented something that lets me put Runes on your skin. I haven't tested it, but I'm sure it will work." You say, putting more confidence into your voice when talking about your supposed 'passion'.

Fleur hesitates for a second before asking. "What is the First Task?" The reply of "Dragons." came with a blank expression from Fleur, showing you that she already knew. "You say you can help protect me? Why?" She asked curiously. "W-well..." You stammer, keeping in character. "I've k-kind of had a c-crush on you since you came to H-Hogwarts..."

She sighs in resignation but then sits delicately on a nearby stump. "What must I do?" She asked with determination. "J-just hold out your arm. Th-this may tickle a bit." You say as you push your arms out from under the Cloak, sharpie in one hand as your other gently grabbed her wrist. Thankfully it was dark enough that she couldn't see if anything peeked out.

Gently you wrote out the words 'Harry Potter' on her forearm and stepped back. "All you need to do now is read it out and tell me what it means." You say with a hidden smirk.

"Alright." Fleur says with a shrug as she looked down at her arm. "It says 'Harry Potter' and it means I am Harry Potter's property." She said simply, confused as to why you were asking such obvious (to her) questions.

"So you'll do anything I say?" You ask as you take of your Cloak and silently cast a 'Lumos' charm.

Fleur's eyes widen in shock before darting to the writing on her arm then back to you. She closes her eyes and nods ruefully. "Oui."

You grin. You're all alone with a Veela that is now what amounts to your personal ****. One that insulted you and now deserves to be punished.