Saber notices Shirou's arrival from her tall branch, from the height she does not perceive the slight height difference or perceives his nature as a Servant. It is not until she drops down, gracefully landing near him and amicably uttering "Shirou—" to call his attention when it hits her.

She frowns as she studies him with widen eyes. He looks older and taller than he looked last night. Has he gotten a growth spurt overnight? And then, there is a vague presence of something that is not human. With so many becoming younger all of a sudden, could it be that he is— It does not matter, she thinks, interrupting her thoughts. Shirou is Shirou.

Her pledge to protect him remains unchanged, even if her contract is now with Illyasviel. It has been for his sake she has done it.

"I will assist you in this endeavor."