Answer to the prompt: "Lucius is forced to get a haircut...from Bellatrix.". This takes place during their Hogwarts years.
"What do you mean it's permanent?" asked Lucius, hysteric.
A disastrous Potions class involving a fourth year Hufflepuff, two separate explosions, and a failed attempt to fix the resulting mess, had turned most of his hair a bright shade of red, and Bella was having the time of her life because of it.
"Oh, don't be so melodramatic, Lucy. It's nothing that a good Severing Charm can't fix." bouncing a little on her feet, Bellatrix raised her wand and grinned maniacally "Now stop moving around so much, unless you want me to also cut off that pretty head of yours."