Lady Integra Fairbrook Wingates Hellsing, more commonly, Integra Hellsing, is one of the main characters from the anime and manga series Hellsing. In both the TV series and OVA series, her Japanese voice is provided by Yoshiko Sakakibara and Kaori Mizuhashi (who plays young Integra), while her English voice in both is done by Victoria Harwood and Tricia Dickson. Her prototype appears as a Nazi in one of Kouta Hirano’s earlier works, HIANDLOW.

Lady Integra Hellsing is a 22-year-old noblewoman member of the Protestant Knights who is the head and last member of the Hellsing family, the Bureau Director of the Hellsing Organization, and the current master of Hellsing’s vampire, Alucard. Integra is usually a collected individual, rarely allowing her emotions to get in the way of business. However, she is sometimes prone to fits of anger. The Hellsing family is “on a mission from God,” and she values her duties to protect the United Kingdom and the Anglican Church above everything else. For her, failure is not tolerated, especially her own. She runs the Hellsing Organization with charisma and patriotism, and she is one of the few people who can stand up to the force of Alucard’s personality and command his respect.
From Wikipedia