Cobi is a Catalan Sheepdog in Cubist style, designed by Javier Mariscal and inspired by the interpretations of Picasso of a masterpiece from Velázquez, Las Meninas.

Given the name Petra, she quickly captivated the organizing committee and was already considered the unofficial mascot of the Paralympic Games.

Unlike Cobi who was short, shy, fearful and uncoordinated, Petra was tall, slender, brave, chatty and friendly.

Her personality is based on plastic artist Lorenza Böttner, a friend of Mariscal's who had lost her arms in an electrical accident as a child.

Mariscal imagined Petra in that vein, an armless girl that is supposed to convey positivity, extroversion, independence, energy and bravery.

[2] Before and during the Games, Cobi and Petra were shown in a variety of advertisements for Olympic and Paralympic sponsors, such as Coca-Cola, Brother Industries and Danone.