Team Reaper was formed to take care of hostile enemy forces that proved strong to handle by any regular or unorthodox means, for example, the team was called in when Danzō had made a hostile move against the well being of the leaf in an attempt to gain power. This was all revealed when Hiruzen Sarutobi undid the seal on the ex-foundation member Hirokazu Uchiha who was the younger brother of the team's captain Karite Uchiha. And so the Purge of Root from Konoha began Later, the group also went on to face Kaguya Ōtsutsuki and won.