No matter the situation, Javier always has a song stuck in his head. That be a traditional Mexican folk song or one he picked up at the gang around the campfire in the warm evenings when everyone is jolly and singing. It doesn't matter what the song is, what style the music is, Javier Escuella will always have music playing in his head.

He could be in a shootout and will be singing. Javier could be breaking into a house, the owners just feet away from him, and he will be humming lyrics of a beautiful song. Many people in the Van Der Linde gang scold Javier, tell him to shut up and be quiet so that they can all have a moments peace but he just can't.