いいiiご身分みぶんgo-mibunですわねdesu wa ne

i-Adjective
"Good." But here it's sarcastic — saying "good" while meaning the opposite. いい身分だ is a set sarcastic expression meaning "must be nice for you" or "how comfortable for you." It implies the other person has it easy while others suffer.

Honorific Noun 🔑
身分 (mibun) = status, standing, position. Adding ご is the honorific prefix — same pattern as ご自分 from a previous lesson. いいご身分 = "what a nice position you're in" → sarcastic: "how privileged of you."

Ojou-sama Speech 🔑
です + わ + ね. わ is a feminine particle, ね is confirmation/exclamation. ですわね is classic ojou-sama speech (refined lady language), even more elegant than ですのね. This is Sakiko's signature speaking style — delivering cutting remarks in the most polished manner possible.

Extended Analysis
Mutsumi says she's worried because "Saki seems like she's about to break." Sakiko fires back with いいご身分ですわね — meaning "easy for you to say from your safe position." She follows up with another iconic line: 弱い私はもう死にました (The weak me has already died).