Arsenkina moved to join Team Alina Kovaleva for the 2018–19 season. The team also included Anastasia Bryzgalova at third, Ekaterina Kuzmina at lead, and alternate Uliana Vasilyeva. They found early success together, winning the Prestige Hotels & Resorts Curling Classic in September and finishing runner-up at the HDF Insurance Shoot-Out. They had another tour victory at the 2018 China Open and two more appearances in finals at the International ZO Women's Tournament and the Qinghai Curling Elite. They also competed in the second leg of the 2018–19 Curling World Cup, missing the playoffs. The team won the right to represent Russia at the 2018 European Curling Championships. They went 6–3 through the round robin, qualifying for the playoffs. They then lost both of their playoff games to Sweden's Anna Hasselborg and Germany's Daniela Jentsch, placing fourth. In February, they were challenged to a best-of-seven by Team Sidorova to determine who would represent Russia at the 2019 World Women's Curling Championship. Team Kovaleva won the series four games to one. At the Worlds, the team qualified for the playoffs in third place with a 9–3 record. They then lost their first playoff game to Japan's Seina Nakajima, eliminating them from contention. At the 2019 Champions Cup Slam event, they qualified for the playoffs for the first time before being eliminated in the quarterfinals by Kerri Einarson. To finish their season, they lost in the final of the 2019 WCT Arctic Cup to Scotland's Eve Muirhead.
