The honest answer for an allergy sufferer
A Russian Blue can be a workable choice for some allergy sufferers, but calling the breed hypoallergenic would oversell it. No cat produces zero allergens. The main triggers are proteins found in saliva, skin flakes, and urine, and a Russian Blue still grooms herself, still sheds skin cells, and still uses a litter box. What the breed offers is a smaller load in some homes: a short, thick double coat that tends to shed less visibly than a long, loose coat, and a fastidious cat who keeps that coat in good order. For a person with mild sensitivity, that difference can matter. For a person with asthma or a strong reaction, it may not be enough, and only time spent with an individual cat tells you which camp you are in.
Why individual cats differ more than breed labels
Two Russian Blues in the same room can leave one visitor comfortable and another watery-eyed, and allergen output varies cat to cat as well as breed to breed. Age, sex, grooming habits, and how much time the cat spends on your bed and sofa all change your exposure. That is why a breed roundup should be the start of your research, not the decision itself. Ask the breeder or rescue if you can visit more than once, handle the cat, rub your hands on her coat, and then wait to see how you feel later that day and the next morning. A single cheerful fifteen minutes in a ventilated visiting room proves very little.
A practical trial before you adopt
Build the trial around your real life. Sit with the cat at floor level, let her climb near your face as she would at home, and spend time near the blanket she sleeps on, because bedding concentrates what she leaves behind. If the source allows a foster period or a trial stay, take it seriously and keep the routine honest: same rooms, same sofa time, same close contact you actually want from a companion cat. Track your symptoms in plain notes, including whether nights are worse, because a cat on the pillow is a very different exposure from a cat across the room. If symptoms build across a few days rather than fading, believe that pattern.
Setting up the home to lower the load
If the trial goes well, you can tilt the home in your favour without turning it into a clinic. Keep the bedroom, or at least the pillow area, as a lower-exposure zone while you settle in, wash hands after long handling sessions, and brush the cat gently in a spot that is easy to clean so loose hair comes away where you choose. Hard floors and washable throws collect less than deep carpet and heavy drapes. Vacuum soft furnishings regularly, launder the cat's bedding often, and keep litter duties prompt, since the box is part of the allergen picture too. None of this makes a Russian Blue allergen-free; it makes a manageable sensitivity easier to live alongside.
Questions to ask the breeder or rescue
Ask what this particular cat's coat and grooming routine look like, whether she has lived indoors with people who had sensitivities, and whether the source will accept a return if a trial stay shows your health cannot cope. A responsible source would rather learn that early than place a cat twice. Also ask for her records in writing: vaccinations, any skin issues of her own, and the foods she is used to.
When the match is right, KinsLe Transferrable Profiles bring that Russian Blue's records, routines, and history across to you intact, so the careful notes from her trial and first home are not lost at the handover.