Article in HockeysverigeRead the source started playing hockey with Hovås HC. He joined Frölunda at 14, as Hockeysverige recounted in a June Article in HockeysverigeRead the source interview.
Hockey was also part of the family: his father, Article in Grand Rapids GriffinsRead the source, had played professionally in Sweden, and Elmer is Arvid's younger brother. In a March 2023 interview with the Article in Grand Rapids GriffinsRead the source, Elmer recalled practising in the family's backyard shooting area, where Arvid sometimes put on his goalie equipment to face his younger brother's shots.
Article in HockeysverigeRead the source chose Skellefteå in 2020, he was looking for the next step in his development, while Frölunda's 2 senior goalie positions were already filled. In the June interview with Hockeysverige, he explained that a positive meeting with Skellefteå goalie coach Article in HockeysverigeRead the source had helped him choose the club. Article in HockeysverigeRead the source.
Article in HockeysverigeRead the source 2025, Söderblom told Hockeysverige that he used to study goalie masks as a child and enjoyed being able to give his equipment a personal design. Article in HockeysverigeRead the source mask for the 2025 World Championship featured the Hovås HC logo alongside other Swedish club logos, as a way of thanking those who had helped him.