Complex sentence: When the paramedics arrived and placed Mifuyuu on a stretcher, she entrusted him with Ensui, and said that he should protect it, and that it would protect him in return.
Split into simpler sentences: When the paramedics arrived and placed Mifuyu on a stretcher, she entrusted him with Ensui. She said that he should protect it, and that it would protect him in return.