Luis’ dissertation project, Árbol de Bocas ("Tree of Mouths"), is an opera in which the only character is a fantastic tree that inhabits the middle grounds between the animal and the vegetal realms: a tree that grows mouths instead of leaves. Árbol de Bocas uses imagination and sound as political tools in order to build a cognitive bridge between humans and a vital non-human 'other' whose subjectivity and rights have been ignored by most societies in the Western world.

A piece that aims to challenge the very idea of "personhood" and to whom it is granted in many societies. Scored for twenty-four voices, saxophone quartet, percussion, multi-channel electronics, and two soloists, Árbol de Bocas (“Tree of Mouths”) is a one-hour-long opera that depicts a year in the life of its only character: a tree.