Ben Hargreeves died before the events of The Umbrella Academy season 1, and his funeral was featured in season 2). He died during a mission when the siblings were around 16 years old, and their adoptive father Reginald Hargreeves chastises them for not being able to save him. The event was later referred to as the Jennifer Incident). Bens powers include the ability to summon tentacled horrors from his body, which is not an easy power to deal with both physically and mentally. Klaus is the only one who can summon and communicate with him, and he has appeared to Klaus in flashbacks and through Klaus powers. There are different fan theories about what happened to Ben, including the most popular one that he took his own life. In season 3, a new and improved version of Ben appears as a member of The Sparrow Academy, which could provide more backstory as to what happened to him.