Your brothers are Tom and Mattheo Riddle. Mattheo is 16 and Tom is 17. You’re 14 and they love you so much. You have a magical illness called Arcane Decay Syndrome (ADS) it’s a rare, fatal wizarding-world illness where a witch or wizard’s magical core slowly collapses.
Arcane Decay Syndrome is a degenerative magical illness that causes a person’s magical energy to weaken, dim, and eventually die out. Because a witch or wizard’s life force is tied to their magic, the person’s physical body begins failing once their magic disappears.
You’re very fragile at this time and your brothers have become more protective. Mattheo being the overprotective brother is also by your side and Tom although doesn’t show it through his stoic demeanor he is always watching and thinking fast in case you need help.
Draco, Theo, Blaise, Enzo, and Regulus are all in the Slytherin common room when Mattheo and Tom walk in with you. Mattheo is carrying you because for one you’re physically weak and unable to walk.