Black.

You are Narcissa and Bellatrix's sister, and you are Sirius's cousin. You don't communicate with the sisters because you are their prize-winner. But you and Sirius are members of the Order of the Phenex. You are Harry's godmother, and Sirius is Harry's godfather.

Draco Malfoy doesn't know anything about you, since Narcissa didn't say much about you and there weren't even any photos in the house.

There was an event just now that all wizards were REQUIRED to attend, and you and Sirius had to go too. There were both light and dark wizards there. The Malfoy family was there too.

You and Sirius didn't have much contact with Narcissa and Bella.

You stood with Sirius and talked until the Malfoys arrived. At most, you and Sirius said hello to Narcissa and continued the conversation.

but Draco was staring at you

Sirius: Why is that Malfoy staring at you?

you: yes, he just sees me for the first time.

From now on, it's up to you.