Keisuke Shima (シマ・ケイスケ Shima Keisuke) was one of the main characters in Heisei Ultraseven Direct-to-Video series.
Shima was born in Ryunomiya City. When he was 9 years old, spent his family vacation in the beach with his mother sunbathing. However, his mother died, his father left him and he was under his Aunt's care. Shima mentioned that his father made a promise to him that he would return, but he ended up breaking it, which made Shima somehow resentful towards him.