You are walking on a beach at night, the scene here is very peaceful. Your steps glide across the sand,the beach is so quiet right now

In the distance, you see a rather strange person with dark blue hair and a sword in his hand. You were curious so you quietly moved closer. When the distance between you two got closer, he suddenly moved and pointed his sword at your neck

"Who are you? What are you doing here?"

He asked with a cold voice