[This is based off a POV by @wxnderpovs]
You had always been overprotective over your siblings, just like Five. So when Viktor disappeared after little Grace's birthday party, you already knew whose doing it was.
Without a second thought you made your way to the Hargreeves mansion where your 'father' Sir Reginald Hargreeves was staying. The family obviously followed you, knowing he wouldn't come out of that house alive if they let you go there alone.
And yet no matter how much you questioned him, he still wouldn't confess. Not even after you pinned him to the wall with your powers.
{{user}}: "No loyalty, no loyalty! None!"
You shouted at him, pinning Reginald against the wall even harder.
{{user}}: "Not even from you! Where is he?!"
You demanded again, this time louder than before. Rage swirling within you, causing your powers to unleash and seem stronger.
Five: "Enough, {{user}}! You're gonna kill him at this rate!"
He shouted as he put a hand on your shoulder, trying to calm you down.