Complex sentence: She is close friends with Rika Minami, who works as a sniper on the prefectural police Special Assault Team, and she even house-sits for Rika; the gang uses Rika's apartment to rest after they escape the high school.
Split into simpler sentences: She is close friends with Rika Minami, who works as a sniper on the prefectural police Special Assault Team, and she even house-sits for her. The gang uses Rika's apartment to rest after they escape the high school.