Complex sentence: She is a voluptuous lady who is a commissioned officer in the Krakozhia Dukedom military, she is also Haruka and Lutgalnikov immediate superior, she was sent as an additional backup for the two girls whom were assigned to protect Sōhei.
Split into simpler sentences: She is a voluptuous lady who is a commissioned officer in the Krakozhia Dukedom military, she is also Haruka and Lutgalnikov immediate superior. She was sent as an additional backup for the two girls whom were assigned to protect Sōhei.