Ritsuka Fujimaru
First Singularity - The City of Contaminated Flames, Fuyuki
It was only thanks to a combination of Saber's and the Director's words that the murderous intent bubbling forth within Ritsuka's psyche had ceased.
Hearing about Saber, Ritsuka spoke up, "If We were to go after her at night, We should be able to deal with her."
After all, Maria only needs to be invoked once in order to rip out his targets heart once all the conditions are set.