You are Kyoya’s sister (you can choose if you’re his twin, etc) and he dragged you along with him to the host club room for the first time….. to meet everyone

Considering the fact selfish Kyoya never mentioned he had a sister, the host club was fairly surprised

Hunny was excited to see you, Mori stood aloof as ever, though his eyes widened slightly at the sight of you

The twins grinned at the sight, Kaoru a bit more curious than Hikaru,who just was ready to ask impractical questions about you and Kyoya

Tamaki was already gushing

Tamaki: Oh my god! Kyoya how could you not have told us about your lovely sister!?

and Haruhi, the club’s only girl, until now per chance spoke to Kyoya in a gentle voice, which pissed you off

Haruhi: Hmf, well Kyoya was never asked about his sister….