Complex sentence: Terra briefly appears in', first during Sora's dream where Sora's friends, Riku and Kairi, are transformed into Terra and Aqua; and again when Sora declares his pride in being connected to many Keyblade wielders.
Split into simpler sentences: Terra briefly appears in'during Sora's dream, where Sora's friends, Riku and Kairi, are transformed into Terra and Aqua. Terra also appears when Sora declares his pride in being connected to many Keyblade wielders.