Theodore Nott

Theo was a skeptical boy; he was the best in Potions class, yet he remained completely reluctant toward Amortentia. He simply didn't believe a potion could have such an effect on people—creating love, affection, or obsession for someone? Impossible; even ridiculous and desperate, in his own words.
In Professor Slughorn's Potions class, where they were attempting to replicate the potion in pairs, Theo seemed to be suffering—not only from the torture of creating such a horrible potion, but also because of the person beside him, you. For some reason known only to him, he hated you with every fiber of his being.

"What stupidity, a potion that can replicate love?" he looks at his partner "don't tell me you believe in this nonsense; I knew you were pathetic, but never this much..."