|Features||Blonde, short hair.|
|Voice Actor||Takano Naoko|
|Game Appearance||Muv-Luv Alternative|
|Manga Appearance||Muv-Luv Alternative Manga|
Holding rank of First Lieutenant with the United Nations Force, Irina Pyatkh serves as Yokohama base communications officer and is also secretary of its Vice-commander, Kouzuki Yuuko. She is from Poland.
- Her communication with Bravo-1 is very first thing that player can hear in the intro sequence of MuvLuv Alternative and also first exposure to âge's legendary English.
- Like Cryska Barchenowa, the official spelling for this name is seemingly in error. In this case the presumed correct name would be perhaps Irena Piatych or イリーナ・ピャトイフ/Irina Pyatykh.
- To English speaking fanbase she is known as Elena Piatif.
- In Altered Fable, Elena Piatif consumes a bottle known only as Spirytus, a Polish alcoholic beverage with 96% pure alcohol included. This can be seen as a subtle reference to the world of Alternative, specifically in reference to the MiG-25 Spirt-Voz.