Casey started out in Reimu, but then switched to Marisa a few episodes later. She then switched back to Reimu in 7A.
Good Luck CharmEdit
Casey was known to be a good luck charm, as when she was on Reimu at first, they kept on winning. When Casey switched to Marisa, Reimu was on a losing streak and Marisa was winning. This status was demolished after BFMC 8B when she was up for elimination.
Casey ended up on the Reimu Tribe.
Casey's Tribe ended up against the Sakuya tribe.