the Emperor's person; His Majesty's presence
Honorific term used exclusively for the Emperor's physical person or presence. Highly formal and respectful; not used for ordinary people.
玉体を案じて、臣下たちは深く憂慮した。
The retainers were deeply concerned about the Emperor's health.
玉体の御
I humbly pray for the continued good health of His Majesty.
Composed of 玉 (ぎょく, 'jewel', a prefix of respect) and 体 (たい, 'body'). The exact historical derivation is uncertain, but the term has long been used in formal contexts to refer to the Emperor's person.