Before fighting broke out in eastern Ukraine, Irina was a croupier in a casino who never dreamt of taking up arms. Now she is gambling with her life.
Using the nom de guerre "Gaika", a cartoon character that translates as Gadget, she has joined an artillery unit in a pro-Russian separatist group fighting government forces.
"When your home is being destroyed, everything that is dear to you, friends, work ... It's about character. Girls who go into combat are real Russian women," she said in an interview, explaining why she joined up.
It has proved a tough experience but she has no regrets.
"Howitzers, large vehicles, the noise is what I will remember most," she said. "Painful memories go away. We try to focus on the positive, joyful, meeting friends. There are so many friends around now, the war is bringing people closer."
Her unit, based outside her hometown of Donetsk, the main rebel stronghold in eastern Ukraine, is part of a rebel militia called Oplot and includes six women - herself, three medics, a fighter and a reconnaissance specialist.
"I had doubts before allowing women in," said their commander Yesaul, a Cossack from the nearby Luhansk region.
"But now I actually have more trust in them then in men. Women don't drink and I am sometimes seriously worried seeing my men's condition when they are relaxing after a mission."
Like the men in the conflict, the women come from all walks of life. A comrade in arms, who gave her name only as Irina for fear of retribution after the conflict, used to work at a petrol station in the town of Gorlovka.
"The fear is always there. But I was more afraid when I was sitting at home and hearing shells fly by. Then I got used to the sound," she said.
Irina has given up many home comforts, but not all.
"War is war but somehow I still need to wear makeup," she said, pointing to the cosmetics by the window of her room at a former factory that has been turned into a base.
Long conflict expected
Women are also among the volunteers fighting on the other side of the conflict.
About 10 women have joined the 150-strong Shakhtarsk Battalion that is fighting alongside government forces and is based in an oak grove about 40 km from the city of Dnipropetrovsk, 250 km (150 miles) from Donetsk.
The unit is recovering from a battle in late August around the town of Ilovaysk in which government forces were encircled and suffered heavy losses.
A 20-year-old nurse called Maria, who was among those who came under fire, said about 30 of the battalion were killed or wounded.
"I didn't want to go into, let's say, humanitarian aid because that makes no real sense if there is no one to drag away our wounded lads. Many die because there was no one to do that. I do that," she said.
She says the men and woman "live, eat and fight together". In combat, she carries only a pistol and a medical bag so that her hands are free to help the wounded.
Her comrade Alyona, 21, joined up after taking part in anti-government protests in the capital, Kiev, that culminated in the removal of a president sympathetic to Moscow.
First she joined the National Guard but she said: "That was roadblocks and checking documents. I wanted to fight."
"This is just the beginning, the so-called ceasefire is just a pause. I want to fight until the end," she added.
Some women come to serve with their husbands and boyfriends, others are single.
Female fighters on both sides said the men in their units treat them as equals, though sometimes showing more leniency. They have little respect for men who have not taken up arms.
"If a man has come to fight, he is a man. Real men fight," said the rebel fighter Gaika. "Those sitting in the city and sipping beer should put on skirts. It's shameful."
On both sides the fighters expect a long conflict, despite the fragile ceasefire now in place.
A red haired rebel fighter called Alla expects to be fighting for a long time.
"So many people, children and women, were killed on our side. Now I don't want a ceasefire," she said.
She has been with the separatist rebels from the start of the conflict, first serving as a cook on a roadblock. She fired her first training shots at a duck on a river and now has a pistol and an assault rifle.
"Maybe I won't kill many of them but if someone is coming, I will get him," she said.