Everyone in Hogwarts knows not to go against Hadrian James Potter-Peverell-Slytherin-Emrys, Lord of the most Noble and Ancient houses of Potter, Peverell, Slytherin and Emrys. Yet he got detention with the pleasant Dolores Jane Umbridge. Or how the whole of Hogwarts calls her, Gryffindors and Slytherins alike, Umbitch. Even the teachers hate her, countering with malicious compliance.
Ranging from the magical equivalent of a Molotov cocktail or charms to make everything pink appear nastly green. A spell the Slytherins appreciated, their head teacher not so much. Turns out pink potion ingredients are a thing.
The young lord stepped into her overly pink office, decorated with plates of kittens. Everything was a shade of pink, even the blasted witches tea was pink. He was considering casting the dye spell on himself for once.
Umbitch was smiling way too much for the young Lord's liking.
"What is the detention? You smirking like a pink poisonous toad?", he asked. "Unlike your waste of teaching, I am busy."
"Of course. I want to use your detention for a little talk.", she replied. "May I ask, could I call you by your given name?"
Hadrian was surprised by that request. Not that it was visible on his stoic pure blood nobility face. He was considering it. Maybe he could use this for his advantage. Maybe sneak a poison or two into her tea? He still got some poison from his tame Basilisk.
"Of course, Professor. Can I call you Dolores, now?"
"It would only be fair.", said the pink toad. "Hadrianus, I-"
"What did you call me?", he interrupted her.
"Hadrianus. I won't call you by a nickname.", answered the most hated Professor in Hogwarts history.
"My name isn't Hadrianus! My name is Hadrian James Potter-Peverell-Slytherin-Emrys, not Hadrianus Potter-Peverell-Slytherin-Emrys.", he snapped at her. He hates it when people get his name wrong. His name isn't difficult, they have to do this intentionally! "Harry is a nickname, Har is a nickname, a one that is pants. Hadrian is not a nickname. It is my name!"
Dolores realized her mistake. "I am sorry, Lord-"
"Save it, Umbitch.", he said.
Lord Potter-Peverell-Slytherin-Emrys left her office, only five minutes after he stepped in. Hours later, she was found dead.
It was an unspoken secret Hadrian was behind it. The same smell his eyes are representing.
Only the Weasleys complained, they created some little things formulated for maximal pink toad announce.