Mr. Ishtar

Mr. Ishtar is the father of Marik Ishtar and the adoptive father of Odion Ishtar. He is a minor antagonist in Yu-Gi-Oh.

History
Mr. Ishtar and his wife adopted Odion after he was abandoned as a baby. Mrs. Ishtar sadly died giving birth to Marik. Her husband showed no sadness about this because he now had an heir. He would later go on to sadistically carve up his son's back as an ancient ritual, and the anger and hate Marik felt towards his father would eventually form Yami Marik. When Marik and his sister Ishizu snuck out (which was strictly forbidden to do) and his father found out, he was about to banish Odion, when Yami Marik took over Marik's body, took the Millennium Rod and stabbed Marik's father to death (while in the 4Kids version, he sent his father to the Shadow Realm though there is little difference between death and being banished to the shadow realm).

Trivia

 * Due to the graphic nature of Mr. Ishtar's crimes he was severely toned down in the anime.
 * Mr. Ishtar is responsible for the creation of Yami Marik because had he not tortured his son, Yami Marik would have never been created and he might still be alive. This makes him the Greater Scope Villain of the Battle City arc.
 * Mr. Ishtar and Marik look exactly alike (except for the beard).