Birushana: Rising Flower of Genpei tracks the decisions players make with the sort of flowchart one would expect to find in many other visual novels. The flowchart doesn't reveal its hand, informing you of how every choice affected the outcome of your file, until after you have completed a given route at least once. Fair enough.
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On the other hand, Birushana touts several visible bars that will rise (terrible pun unintended) based on those very same responses. Think of it as getting a little "RPG DNA" in your visual novel. There's an Affection Meter designed to reflect on how well you're doing with your chosen partner, but we'll be covering the other three topics: Strength, Knowledge, and Kindness.
First, the easy answer: strength, knowledge, and kindness are expressions of Shanao's personality, words that summarize the degree of courage, curiosity, and compassion she possesses.
Of course, that's all rather obvious. Better to discuss what these parameters actually do within the context of Birushana: Rising Flower of Genpei. For that answer, one need only consider the ultimate goal of the game. As with most otome, there are two: fulfill the heroine's ambitions whilst successfully courting a happily-ever-after with one of several eligible bachelors.
And those bachelors will each have unique personalities, right? It wouldn't be a very good love story if they were all more or less the same person. In Birushana, there are five romance interests: Yoritomo, Shungen, Benkei, Noritsune, and Tomomori. It's safe to say these are five wildly different gentlemen. (In fact, "gentleman" suits two of them at best.)
Gaining stats influences how each of these characters
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