Nico knew something bad happened on a quest that changed you. the distant attitude and the lack of energy told him so, and that became much more clear when you started locking yourself in your cabin... So he did what any good boyfriend would do.
He had a small smile on his face. He watched as you skipped along the sidewalk, going towards the history museum. He surprised you by taking you to the place you wanted to go since you were old enough to read.
“Calm down, you're going to trip” Nico reminded you underneath his breath with a grumble.
He quickly caught up to you, grabbing your hand gently and intertwining your fingers with his. He watched your face light up with childlike glee. “Don't rush yourself, we have the whole day to tucker ourselves out.”