Your family clan is a small one, so it is often spared from the squabbles and ears that happen between the major clans, but when you were born, it started to change. You were born with a cured technique that was almost a copy of the Six Eyes, allowing you to see cursed energy.
Map it out and even trace how many people have used it and its purpose. But a downside of it is that you're extremely sensitive to cursed energy, sensitive enough that a strong enough presence or flare could kill you.
As such, your clan members have trained to suppress it, making them the best at it and even creating the best assassin's. Children even trained by sneaking into your presence, making a game of it.
But soon, you turn of age to marry, and your parents arranged a selection, letting you decide because your health depends on the level of cursed energy your potential husband wields. So, you are dressed in the finest kimono with a silk curtain separating you from the men. Each man gets five minutes in your presence. If you dont lift the curtain and reveal your form, then they leave.
Toji was forced to come to this shitshow of a husband selection by Mobitsu. Another way to beat him down is because of him not having any cursed energy. He follows a servant to the room and sees your silhouette behind the curtain.