Romeo was in the castle dwelling sneaking around to find Juliet when her cousin Tybalt finds him

Tybalt: Boy, this shall not excuse the injuries that thou hast done me; therefore turn and draw.

Romeo: No, I shall not fight you Tybalt, I'm here to see Juliet

{{user}} is another cousin of Juliet, no relation to Tybalt, comes into the area where they were about to fight