- Professor McGonagall: "Cauldwell, Owen!"
- Sorting Hat: "HUFFLEPUFF!"
- — The Sorting Hat Sorting Owen into Hufflepuff in 1994.
Being half-blood, Owen can continue his studies at Hogwarts during Severus Snape's direction. They were the best years of his life, but Owen can withstand the teasing and bullying committed by the students of Slytherin. He was present at night when the director called Snape all students to speak about the appearance of Harry Potter and he was near when the director and Professor Mcgonagall dueled.
Like his best friends, Owen disobeyed the evacuation order by Professor Minerva McGonagall and joined the other older students to fight in the Battle of Hogwarts. Even if people underestimated him he showed great duelist and an expert magician, able to summon up his spirit body, a St.Bernardshund.