Her mother died of breast cancer when Koski was eight years old; her father remarried, and her stepmother adopted her.

[4] She was elected in the first round of ranked choice voting, defeating incumbent Jeremy Schroeder, who ran in favor of the Department of Public Safety.

[13] In March 2024, she changed her vote on an ordinance establishing minimum wage for rideshare drivers, overriding Frey's veto.

[14] That October, her letter criticizing the delayed MPD response to the shooting of a Minneapolis resident by his neighbor again broke with Frey and gained media attention.

[16] Frey-aligned PAC All of Mpls, which endorsed her past City Council campaigns, removed her from their marketing materials during this term.