Baba Yaga
Some scholars have proposed that the concept of Baba Yaga was influenced by East Slavic contact with Finno-Ugric and Siberian peoples. The Karelian "Syöjätär" has some aspects of Baba Yaga, but only the negative ones, while in other Karelian tales, helpful roles akin to those from Baba Yaga may be performed by a character called "akka" (Karelian for "old woman").