Alejandro Sebastián Romero Gamarra, commonly known as Kaku, is a professional footballer who plays as an attacking midfielder or winger for UAE Pro League club Al Ain. Born in Argentina, he represents the Paraguay national team at international level. He is known for his creativity, flair, and technical skill in advanced attacking positions.

Kaku operates effectively both centrally and out wide, using his close ball control, vision, and dribbling ability to create scoring opportunities for teammates. His attacking intelligence and versatility allow him to adapt to different tactical systems, while his experience at club and international level has established him as a key creative presence in the final third.