Webk oyuki is a pivotal character in demon slayer, intricately tied to the tragic backstory of the demon akaza, formerly known as hakuji. Once a frail and bedridden girl, koyuki was the. Webin the demon slayer series, koyuki is a key character in akaza's tragic past representing the love and the humanity he lost after turning into a demon. Webthe ice breathing (氷こおりの呼こ吸きゅう, kōri no kokyū) is a breathing style derived from water breathing. The ice breathing combat and breathing style mimics ice,. Webthe secret to the incredible power wielded by demon slayer's swordsmen is linked to the breathing techniques they employ within a handful of broader. With most demons' powers working in ways that simply allow their powers to do the fighting for them, akaza is unique in how his blood demon arts. Webbreathing styles (呼 (こ) 吸 (きゅう) 法 (ほう) kokyū hō?) are swordsmanship styles that utilize total concentration breathing which are practiced and taught by demon slayers. Webkoyuki urging akaza to stop fighting. During the intense battle between akaza, giyu tomioka and tanjiro kamado, koyuki appears as a voice of reason to try to stop akaza. Webbreath style techniques are specific and concentrated breathing patterns that allow practitioners to increase their lung capacity and the amount of oxygen in their. Webtotal concentration breathing is a breathing technique which involves expanding one's lungs to intake as much air as possible, accelerating one's blood flow and heartbeat.