Aburako Dousan

About
Oily Girl Dousan might be a minor character in Sengoku Rance without many appearances or even unique affection events, but she is well loved for the ability to recruit her early in a run through, and her extraordinary skills in battle, most notably her proficiency in Action Transfer, which allows her to replenish allies both in troop and solo battles, unlike many other monks, who only have the skill available in solo battle.

Personality and Appearance
Based on an April Fool's joke (see trivia), she naturally has a humorous and bubbly personality. In battle, she will shout lines like "Maximum slippery!" or "I'm the oil-dwelling girl, Oily Girl, sliding onto the scene!".

There are 2 events that can occur that relate to her. In one, 3G hints at her recruitment conditions by introducing her 3 loyal subordinates, Stubborn Ittetsu, Cucumber Andou, and Takuan-sama, commanders who can be recruited after conquering the Mamushi Oil province.

In addition, another event where the three discuss whether to fight for Ashikaga Choushin, we learn that Oily Girl makes greasy food. Of note, Cucumber reflects on how he loves eating cucumber with the food Oily Girl Dousan used to make before she disappeared, abandoning Mino for mysterious reasons just before the events of Sengoku Rance.

This is probably not a coincidence, as Oily Girl Dousan, like her historical counterpart Saitou Dousan, is at once an oil merchant as well as a feudal lord. So her disappearance might reflect her whimsical shifting between her roles, and how her subordinates are often left hanging at her unpredicatable behaviours.

The meaning of "Oily" should not, however, be taken solely as a reference to greasy food. From her lines, we can safely interpret the Oily in her name to have a double reference to grease, as well as to petrol, as she talks about how she is an oil dweller and wears scuba gear in her depictions. Speculatively, we might relate one of her lines "I-I live freel common attitudes from some parts of the oil industry.

Trivia

 * Saitō Dōsan is the name of a famous Japanese Daimyo (feudal lord) who was Nobunaga's father in law (father of Chou). Dousan was also known as the Viper of Mamumushi. Dousan was originally born to a merchant family and started off as an oil merchant
 * Oily Girl Dousan was originally 'announced' as the main character of the game "Oily Girl's doki doki naval adventure 油娘どきどき海中旅行" by Alice Soft, an April Fools in 2005.