Andre, known in the Japanese version as Andore, is Team Unicorn's ace player. Similar to Yusei Fudo, Andre is known for his genius Dueling style rather than relying on a set strategy, as he analyzes his opponent's tactics and adjusts accordingly by taking advantage of whatever he has currently in his hand.
Before joining Jean and Team Unicorn, he is seen Dueling against another Duelist, who defeats him. After his defeat, Jean approaches him, taking note that Andre could have won the Duel. When Andre doesn't say anything, Jean tells him that he is like himself: neither of them wants to watch the loser upset, so they lose the Duel on purpose. Jean then requests that Andre join his team, to which Andre accepts. Jean suggests that if they Duel as a team, they will be motivated to win so that they do not disappoint their teammates. They will not be Dueling for only themselves, but for the team as a whole.
During the WRGP Premier Event, Andre approaches Yusei Fudo, as he recognizes him to be the winner of the Fortune Cup.
Before the WRGP preliminaries commence, an incident occurs during Andre´s team early riding practice. Breo intentionally crashes into Crow, and fortunately, no one is hurt. After Jack Atlas and Yusei arrive to the scene, Andre introduces himself along with his teammates, Breo and Jean. At that moment Yusei recognizes him from the Event and also that they are Team Unicorn. After some discussion between the 2 teams, Andre convinces Yusei to Duel against him, and Yusei agrees to this.
Even from the start of the Duel, Andre threatens Yusei by swarming his own field with powerful Beast-Typemonsters. However, Yusei manages to make a comeback and almost wins the Duel, but the Duel is stopped due to a time limit rule. Yusei notes afterwards that Andre still had a trap that could have turned the Duel around when the time limit was reached.
On the day the WRGP commences, Andre's team faces off against Team 5D's. The first member of Team Unicorn to play is Andre against Jack Atlas. Following the team's strategy, Andre has switched from a Deck of Beatdown monsters to one that takes advantage of the opponent's attacks. As a result, Andre overpowers Jack, reducing his life points quickly. Jack tries to fight back, but in the end, he gets overwhelmed by Andre's strategy and ends up losing.
The next opponent he faces is Akiza Izinski. Though she burns through a good amount of his Life Points, he deals even more damage, and Akiza sacrifices the last amount of her Life Points to Summon Yusei's "Stardust Dragon". The third Duelist he faces is Yusei. Andre loses after dealing 2000 points of damage to both himself and Yusei.
After Team 5D's wins the Duel, Andre, Jean and Breo Duel Team Catastrophe, with Andre as their starter once again. Unfortunately, both Andre and Jean crash, and Team Catastrophe wins by default because Jean could not get back to the starting line.
During Yusei's Duel with Jakob, he remembers Andre along with his team mates as one of the powerful teams which he has faced and won't forget.
During Yusei's Duel with Z-One, Andre along with his team mates are among the crowds of people cheering Yusei on to defeat him and save New Domino City.
Andre was first seen during the opening ceremonies of the D1 Grand Prix. He has yet to be seen Dueling but it is presumed that he is participating due to an embarrassing loss against Jack Atlas as Rex Goodwin mentioned that the participants all have some form of vendetta against the king.
Andre plays a Beast Deck that involves a myriad of strategies that he can oscillate between very quickly. His trump card is "Thunder Unicorn".
In the Japanese version, when Yusei destroys Andre's Speed Spell - The End of the Storm, Andre mockingly replies "gracias", the Spanish word for "thank you". This suggests that Andre is either Spanish or from a Spanish-speaking American country.
Andre and Jakob are the only non-Signers to have defeated more than one signer.