First appearing in the stands of the Parc des Princes during France Jr. youth's secret training, chewing gum, and catching a loose ball (Captain Tsubasa arc, chapter 89, page 36), he'll then help Misaki get past Pierre and other players of France Jr. youth, then score against them (Captain Tsubasa arc, chapter 89, pages 44 to 48). No one at the time seems to know him, as he is kicking a long shot that seems to impress both Misaki and Pierre (Captain Tsubasa arc, chapter 89, pages 50-51). Coach Carbonara will then make him join France Jr. youth, and he will be revealed to be Louis Napoleon, a good, but hot-blooded player who was made to leave his matches often because of his behavior (Captain Tsubasa arc, chapter 90, pages 26 to 28).

Benched in the first match of the International Jr. Youth tournament against England Jr. youth, he'll behave terribly, shouting at the coach and insulting him, even though it was for his sake, to observe his teammates and play better with them (Captain Tsubasa arc, chapter 92, pages 114-115). He'll still get in during the match after France Jr. youth is being led by England Jr. youth and have troubles reversing the score (Captain Tsubasa arc, chapter 92, pages 110 to 127), he'll tie with the shot that was witnessed by Misaki and Pierre (Captain Tsubasa arc, chapter 92, pages 126 to 135), reverse the score and achieve a hat trick, his first grade sense making him a good match with Pierre (Captain Tsubasa arc, chapter 92, pages 136 to 139). He'll also achieve a hat trick against Malaysia Jr. youth (Captain Tsubasa arc, chapter 93, pages 34-35).

Against Japan Jr. youth, he'll be tricked by Soda's razor pass (Captain Tsubasa arc, chapter 98, pages 28-29), and with Soda tasked to mark him (Captain Tsubasa arc, chapter 99, pages 6-7), his pivot leg will be tackled after he has passed the ball (Captain Tsubasa arc, chapter 99, page 5), that incident will turn into a fight between them, making them earn a yellow card each (Captain Tsubasa arc, chapter 99, pages 10 to 12), but Pierre will scold him (Captain Tsubasa arc, chapter 99, pages 12-13). As a result, he'll behave, motivated by the fact that he can't leave without scoring, wanting to be crowned as the n°1 striker of the match (Captain Tsubasa arc, chapter 99, page 42). However, the match will go into extra time with him still having to score 2 goals to achieve a hat trick in 3 successive matches like Schneider (Captain Tsubasa arc, chapter 100, pages 60-61).

However, he'll fail to achieve a hat trick and resent Wakashimazu for this and will want to break his hand for preventing him to achieve his ambition, however, this wil backfire as Wakashimazu will be able to repell his cannon shot thanks to a true fist defense (Captain Tsubasa arc, chapter 102, pages 15 to 20). As a result, he'll be the only one who failed his penalty kick during the pk shootout and will cry because of this (Captain Tsubasa arc, chapter 102, page 32).

Him and France Jr. youth will end up in 3rd place of the International Jr. youth tournament, along with Uruguay Jr. youth (Captain Tsubasa arc, chapter 108, pages 86-87).