These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Complete Monster: Tenzen Yakushiji, the Number Two of the Iga Clan and the true Big Bad, absolutely leaps heads and shoulders over any of his fellow ninja for sadism, cruelty, greed and monstrosity. Secretly a centuries old former Koga himself, Tenzen has nothing but loathing for the Koga and little use for his own Clan. When Princess Oboro seals away her mystic eyes, Tenzen attempts to rape her before being stopped by a Koga attack. Engaging the Koga ninja, Gyobu Kasumi, Tenzen hears how Gyobu's father was murdered by Iga and in their duel, tricks Gyobu into striking at a child, forcing the boy's father to take a fatal blow, solely so the child's pain rattles Gyobu enough for Tenzen to win. Tenzen sadistically toys with other ninja and abandons his loyal student Koshiro because Koshiro had objected to his actions with Oboro. When Tenzen captures the beautiful Koga shinobi, Kagero, because her powers make raping her impossible, he brutally tortures her by impaling her with needles, before attempting to rape Oboro with intent of forcing her to dispel Kagero's powers to force himself on her as well. When he faces off with the young Koga leader Gennosuke, Tenzen reveals his intent to destroy all in his path, end the war victoriously and force Oboro to be his bride while he rules Japan from the shadows through the young shogun.
Jerk Ass Woobie: Hotarubi is totally crazy and VERY violent while fighting, but her last scene was totally heartbreaking. So much that not even the guy who kills her can deny her a last flash of happiness before she kicks it.