A 1st year high school student with a strict personal policy to never waste more energy than he needs to. As a result, Houtarou's motto is "If I don't have to do it, I won't. If I have to do it, I'll make it quick." Joining his school's Classic Literature Club at the request of his older sister, Tomoe, Houtarou finds his personal policy in constant danger of being broken due to the influence of the ever-curious, Eru Chitanda.

Doesn't talk much, saves energy 

EMIYA was a version of Shirou Emiya from a possible future in which he formed a contract with the World that allowed him to become a Heroic Spirit at the cost of working as a Counter Guardian for the Counter Force for the rest of time. He is from the Fate series Universe and user of unlimited blade works.

Parallel Universe holy grail war 

Canonically, Gudako (like her male counterpart, Ritsuka Fujimaru) is portrayed as an ordinary human thrust into extraordinary circumstances.
She begins as a rookie Master with no prior combat or magecraft experience but displays remarkable courage, empathy, and adaptability.

Despite being “just human,” she faces gods, kings, and cosmic beings with steady resolve — not through power, but through heart and willpower.
She deeply values her Servants, seeing them as comrades rather than tools.