Shadow Yosuke: Shirou and Izanagi had to face off against the boss alone, while it had a considerable advantage in speed and their types countered one another. At one point Shirou takes an attack strong enough to destroy the environment without any protection since Izanagi was protecting the others. He got right back up and kept fighting.
Shadow Chie: Yosuke tried a preemptive strike and when that failed worked in tandem with Shirou, as well as learning how to use his spells.
Shadow Yukiko: Not only did they have to face off against Shadow Yukiko, but it's aide Charming Prince. Jiraya was all but untouchable, so the shadow got clever by shooting Chie in the back with her weakness and then having her aide paralyze Yosuke and dropping a chandelier on him. Shirou summons Eligor to finish off Charming Prince, and Chie upgrades her regular spell to use Bufula and finish it. Before that, Yukiko herself shows her determination, cutting off Chie's apology to tell her and the others to run, fully intending to sacrifice herself to save them (though it doesn't come to that).