Ultimate ???

Ultimate ???, called Super High School Level ??? (超高校級の「???」chō kōkō kyū no “???”) in the Japanese version is a title given to multiple people in Danganronpa series.

Overview
Ultimate ??? refers to people whose original talents are originally unknown. In Danganronpa: Trigger Happy Havoc, Kyoko Kirigiri refuses to tell Makoto Naegi her talent, and Makoto notes that she is the only person online whose talent cannot be found. It is later revealed in Chapter 5 that she has amnesia and cannot remember her talent. Her talent is later revealed to be the Ultimate Detective and the Mastermind erased her memory of this due to her being a threat to the Killing School Life.

In Danganronpa 2: Goodbye Despair, Hajime Hinata claims to not remember his talent, with Nagito Komaeda believing that this is due to stress. Hajime is often worried about what his talent might be. It is later revealed in Chapter 4 by Nagito that Hajime does not have a talent and that he is a Reserve Course Student. It is later revealed in Chapter 6 that Hajime is actually Izuru Kamukura and thus the Ultimate Hope due to a transformation by the Izuru Kamukura Project.

In Danganronpa: Togami, "K" mentions he is a graduate of Hope's Peak Academy, and a Former Ultimate, however he never specifies his talent, hence the "???" title. Given the circumstance, his true talent is likely related to Writing/Literature.

In Danganronpa V3: Killing Harmony, Rantaro Amami claims to not remember his talent, though he isn't particularly worried about this and looks forward to what it is.

Rantaro's true talent is revealed much later in Danganronpa V3 to be the Ultimate Survivor, a person who has survived a previous killing game hosted by Team Danganronpa. However, in the bonus mode Love Across the Universe: Dangan Salmon Team, he "remembers" his talent to be Ultimate Adventurer instead, which is assumed to have been his talent in the 52nd Killing Game.