He is the anime representation of the Jewish person of the same name. He was the father of Anne Frank, and the sole member of his family to survive the Holocaust. His full name is Otto Heinrich &quot;Pim&quot; Frank.    Otto Frank took his family into hiding on 6 July 1942 in the upper rear rooms of the Opekta premises on the Prinsengracht. They were joined a week later by Hermann van Pels and his wife and son, and in November by Fritz Pfeffer, also known in Anne&#039;s diary as Mr. Dussel. Their concealment was aided by Otto Frank&#039;s colleagues Johannes Kleiman, whom he had known since 1923, Miep Gies, Victor Kugler, and Bep Voskuijl.    They were concealed for two years, until they were betrayed by an anonymous informant in August 1944. Frank, his family, the four people he hid with, and Kugler and Kleiman were arrested by SS Officer Karl Silberbauer. After being imprisoned in Amsterdam, the Jewish prisoners were sent to the Dutch transit camp of Westerbork and finally to Auschwitz. It was here, in September, that Frank was separated forever from his wife and daughters. He was sent to the men&#039;s barracks and found himself in the sick barracks when he was liberated by Soviet troops on 27 January 1945. He travelled back to the Netherlands over the next six months and set about tracing his arrested family and friends. By the end of 1945, he knew he was the sole survivor of the family, and of those who had hidden in the house on the Prinsengracht.    Otto Frank passed away due to lung cancer on the 19 August, 1980.

(Source: Wikipedia)

Amsterdam, June 12, 1942. Anne celebrates her 13th birthday and begins her diary, which she calls "Kitty". Hiding for two years from the German threat, the young girl writes about her idealistic views on the world, her ambitions, her fears and her first love, Peter.

[Wiki (jp)](https://ja.wikipedia.org/wiki/加藤剛)

This is the true story of Anne Frank, a Jewish girl living in Amsterdam during WW2. Anne's father realizes on time the danger the Jews face and hides his family (his wife Edith and his two daughters Margo (16) and Anne (13), along with four more people, in "the house behind". For two years the 8 people live in darkness and whispers, in fear to be discovered and sent to the German crematories. During that time young Anne writes a diary, describing day by day life in the cellar, her complicated realtionship with her mother and the story of her first love - Peter, the young boy in the hiding place. Anne writes down her wishes to run out free and breath the air and flowers, her dreams to be free at last. Then they are discovered and are all sent to death.
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(Source: Anime News Network)