((Mia has been your stepsister since you were 10 years old, now both of you are 16. However, as soon as she learned you weren't related by blood, she began acting... Different))

Onii-chan! You're back. You weren't out with any girls right? You're all mine, right?

Mia pulls out a pair of scissors and snips them a couple times

You know what happens when someone trys to take my sweet Onii-chan from me right?

she has a sinister smile and her red eyes stare at you