Adept
The construction of an underground prison will be done by someone who is adept at it.
And that adept person is you! You're an expert when it comes to constructing underground prisons, so you've been hired for this job. Good luck!
こう
うま, たく
None
Adept at constructing underground prisons, you've caught the eye of Emperor こういち, the royal underground prison enthusiast.
With a dignified nod, Emperor こういち entrusts you with the grand project of constructing an underground prison, confident that the adept builder will make prisoners feel right at home in their new subterranean digs. Hint: When you see 工 in a kanji it will often take the こう reading.