*Club domestic league appearances and goals, correct as of 21:33, 25 May 2024 (UTC) ‡ National team caps and goals, correct as of January 11, 2025 (UTC)
From 2012 to 2015, Guillou played for the UNC Wilmington Seahawks women's soccer (football) team which competes in the Colonial Athletic Association Division 1.[4] In her senior year, she helped the Seahawks secure an at-large berth for the NCAA Division I.[2]
Club career
Oulu Nice Soccer
After graduating from UNCW, Guillou signed up to play for Finnish club Oulu Nice Soccer in 2016.[5][6] She made 8 appearances and 2 goals for the club in the 2016 Naisten Liiga season.[7]
Lugano
In August 2016, Guillou left Finland to join Swiss club FF Lugano 1976. She appeared in 13 matches in the regular season and helped Lugano advance to the playoffs where she played one more game in the final round of 2016–17 Nationalliga A.[8]
Oulu Nice Soccer
In 2018, Guillou returned to Finland signing with former club Oulu Nice Soccer until the end of 2018 Naisten Liiga season where she scored 6 goals in 15 matches.[9][7]
Morön BK
In December 2018, Guillou joined Swedish Elitettan club Morön BK.[10][11] During the 2019 season, she scored 8 goals in 23 games.[7]
In December 2020, Damallsvenskan club Piteå IF signed Guillou on a 1+1 year deal.[14] She played 3 seasons for the club scoring 12 goals in 61 matches.[7]
Hammarby
In April 2024, Guillou signed with Damallsvenskan side Hammarby.[15] She made 3 appearances for the team. Her short-term contract expired in July 2024.[16]
When she was still a college player, her coach convinced her to join a national team. Two years prior to the Asian Cup, she sent the Philippine Football Federation a highlight reel of her earlier part of her stint in Sweden which led to her securing a Philippine passport in order for her to be able to play for the national team.[18]
Guillou made her first cap for the Philippines in the national team's 1–0 win against Thailand at the 2022 AFC Women's Asian Cup.[19] In that same tournament, she scored her first international goal for the Philippines in their final group match, a 6–0 win against Indonesia.[20] On April 11, 2022, Guillou scored her first international hat-trick in a friendly against Fiji, which the Philippines won 8–0.[21]
Guillou played for the Philippines in the 2023 FIFA Women's World Cup. In their opening match against Switzerland, Guillou scored in the 16th minute but was offsides.[22]