Isabella Tobias (born August 23, 1991) is an Israeli retired ice dancer who competed for both Georgia, Lithuania, and Israel.

With Stagniūnas, she won the bronze medal at the 2011 Skate America, placed in the top ten at two European Championships, and represented Lithuania at the 2014 Winter Olympics in Sochi.

She took up ice dancing at age 10 and competed with Kurt Lingenfelter on the intermediate level and with James Warren in novice.

In order to allow the team to compete at the 2014 Winter Olympics, Tobias submitted an application for Lithuanian citizenship in October 2012.

[7] By finishing 15th at the 2013 World Championships in London, Ontario, they qualified a spot for Lithuania in the Olympic ice dancing event.

[3] Tobias/Tkachenko began the season on the Challenger Series (CS), winning silver medals at the Finlandia Trophy and Mordovian Ornament.

After placing 6th at the 2016 Skate America and 5th at the 2016 Trophée de France, they won silver behind Elena Ilinykh / Ruslan Zhiganshin at the 2016 CS Tallinn Trophy.

Due to their result, Israel qualified a spot in the ice dancing event at the 2018 Winter Olympics in Pyeongchang, South Korea.

[2] On 12 April 2017, Tobias/Tkachenko announced a coaching change, having decided to join Marina Zoueva, Oleg Epstein, Massimo Scali, and Johnny Johns at the Arctic Edge in Canton, Michigan.

Due to Tkachenko's unsuccessful application for Israeli citizenship, they were not included in Israel's team to the 2018 Winter Olympics.