Entertainment
Shirabyoshi in Rise of the Samurai and geisha in Fall of the Samurai can increase the loyalty of your generals and town growth in your provinces by entertaining them. To entertain, simply select your shirabyoshi, right-click on your target general or castle town and select entertain from the options presented to you.
Inspire Castle Town & Inspire City
When inside a castle town (in Shogun 2) belonging to their clan where 50% of the population or more follow the clan's official religion, a monk or missionary will decrease unrest and the chances that the garrison will be bribed. A sense of spiritual calm will be spread throughout the population simply by their presence. The inspiration effect will last as long as the agent is inside the castle town in question.
Scouting
Ninja in Shogun 2, monomi in Rise of the Samurai or shinobi in Fall of the Samurai can be placed inside friendly armies to increase their action points and prevent enemy agents from demoralising them.
Inspire Army (Fall of the Samurai)
Geisha in Fall of the Samurai can inspire your troops and raise their morale, a useful skill if they will be fighting a battle during the same turn. To inspire, simply select your geisha, right-click on a target army and select inspire from the options presented to you.
Supervise Recruitment & Train Troops
A foreign veteran can be placed inside a city to supervise troop recruitment, which reduces costs. Veterans can also train troops, either in a city or in the field. Training increases their experience levels. The savings and experience imparted are directly linked to the rank of the veteran in question.
Instil Fervour
In Fall of the Samurai an ishin shishi can instil fervour amongst the ranks of the army he is embedded in, improving the quality of their charge. The level of improvement is linked to the experience of the ishin shishi in question.
Rally Populace
In Fall of the Samurai ishin shishi are able to rally uncertain elements of the population to the imperial cause by increasing happiness in a town. As allegiance to the Emperor increases, the happiness effect will also increase. Simply select an ishin shishi and right-click on a town to begin rallying the population.
Instil Discipline
In Fall of the Samurai a shinsengumi can instil discipline amongst the ranks of the army he is embedded in, improving their melee defence capabilities. The level of improvement is linked to the experience of the shinsengumi in question.
Performing
In Fall of the Samurai a geisha will perform whilst standing anywhere on friendly territory (NB: on the landscape itself, not when embedded in an army or settlement). She will boost economic growth simply by her presence.
Military Administration
In Fall of the Samurai a foreign veteran placed anywhere on friendly territory (NB: on the landscape itself, not when embedded in an army or settlement) will reduce local recruitment costs by his presence alone.