¿Who is stronger, Whis or Buu?

Whis is a prominent character in the "Dragon Ball" series, serving as the angelic attendant and martial arts master to Beerus, the God of Destruction for Universe 7. First introduced in the film "Dragon Ball Z: Battle of Gods," Whis is depicted with a serene demeanor, light blue skin, and distinctive white hair. As an angel, he possesses extraordinary abilities, including Ultra Instinct—a state of heightened reflexes and movement. Whis is responsible for training both Beerus and Goku, aiding them in mastering advanced combat techniques. Despite his calm and composed nature, he exhibits a fondness for Earth's cuisine, often indulging in various delicacies during his visits. His character adds depth to the series by exploring themes of divinity, mentorship, and the balance of power within the universe.

Majin Buu is a pivotal antagonist in the "Dragon Ball" series, introduced during the "Majin Buu Saga" of "Dragon Ball Z." Created by the dark wizard Bibidi, Buu is an ancient entity with immense power and a malleable, pink physique. Throughout the series, Buu undergoes several transformations, each altering his personality and power levels, including Innocent Buu, Evil Buu, Super Buu, and Kid Buu. His abilities are vast and versatile, encompassing regeneration, absorption, and transmutation, such as turning adversaries into sweets. Despite his initial role as a villain, aspects of Buu's character, particularly in his Innocent form, display a capacity for change and even benevolence. This complexity adds depth to his character, making him one of the most memorable antagonists in the "Dragon Ball" universe.