Career
They are six-time medalists on the International Skating Union Junior Grand Prix series and two-time (2011, 2013) Russian Junior medalists. Kosigina began skating to improve her health and took up ice dancing when she was eight. She competed in novice ice dance with Anatoli Kolisgo and later skated with Sergei Mozgov, with whom she debuted on the Junior Grand Prix.
Her partner left her after the 2009-2010 season.
Kosigina began skating with Nikolai Moroshkin in June 2010, coached by Alexei Gorshkov in Kosigina"s hometown of Odintsovo, near Moscow. These medals qualified them for the Junior Grand Prix Final, where they finished sixth.
Kosigina/Moroshkin competed in the 2011-2012 Junior Grand Prix, winning silver in Latvia and bronze in Estonia. They finished fifth at the 2012 Russian Junior Championships and were not assigned to Junior Worlds.
Kosigina/Moroshkin received additional coaching from Igor Shpilband in preparation for the 2012-2013 season.
Kosigina/Moroshkin finished fourth at the 2014 Russian Junior Championships. Initially first alternates, they joined the Russian team to the 2014 World Junior Championships after Alexandra Stepanova / Ivan Bukin withdrew. (with Moroshkin).