As a member of the Finnish national ice hockey team, she won a bronze medal at the 2021 IIHF Women's World Championship.

Nilsson grew up in Kirkkonummi, a municipality in the western Greater Helsinki region, where she began playing ice hockey at age 5.

Before the 2014–15 Naisten SM-sarja season, seventeen year old Nilsson moved over 400 km (250 mi) away from home to sign with KalPa Naiset in Kuopio.

Her point total ranked fifth on the team and she tied with Maja Nylén Persson for third-most goals scored, behind only Lara Stalder and Anna Meixner.

She entered the 2023–24 SDHL season without a contract and did not play until October, when she signed with Frölunda HC to fill the gap left when the team's captain, Hanna Olsson, was sidelined by a season-ending hamstring injury.

[4] At age sixteen, Nilsson was invited to join the senior national team but was committed to other interests at the time and choose not to pursue the opportunity.

The couple planned to relocate to Sweden in the summer of 2020 so Nilsson could sign with a SDHL team but they altered course and chose to remain in Finland as the COVID-19 pandemic created uncertainty and other challenges.

At that time, Nilsson shared that she had also applied to Polamk and, though she had not yet received the results of her entrance exam, she hoped to enroll and complete her schooling in Finland before she would consider playing ice hockey abroad again.