Guardián translates to "guardian" or "keeper". It's a strong and evocative word that suggests protection and deep care, making it more interesting than common verbs or nouns.
In the song, David Bisbal asks, "¿Quién es el guardián de tu cuerpo?" (Who is the guardian of your body?). He uses this word to express his desire to be the one who protects and watches over his beloved, highlighting a sense of devotion and possessiveness in his love.
"Quién Es" is David Bisbal singing about jealousy and heartbreak after losing someone to another person. He keeps asking the same question, over and over: who is this person who now holds his ex's attention, who comforts her, who "cures her wounds" and "conquers her heart" the way he once did?
The song moves between tenderness and frustration. In the verses he remembers what they had — the warmth, the closeness, the sense that their love felt permanent. In the chorus his voice turns more urgent, almost pleading, as he lists everything the new person seems to be doing right: being there for her, making her happy, being "better than him."
It's a song about watching someone move on and not being able to look away, asking a question that never really gets an answer.