Seeing his impending death approaching, Kiritsugu Emiya contacts a non-mage he cooperated with sometimes during his Enforcer days, and asks this individual to check on Shirou once in a while. It helps that this comrade-in-arms happens to have the same given name as Shirou. His last name happens to be Takamachi. Aspiring Hero, meet Ultimate Bodyguard.
When the Holy Grail War comes around again, it's going to be hard to say who's more surprised: the TSAB contingent (including Shirou's "little sister," Nanoha), or the Magus community.
"UNLIMITED BREAKER WORKS!"
"I never copied a sentient Noble Phant-- er, Device, before. So... what do we do with a dozen Reins?"
"SHIROU! Your little sister can fly."
"Er... yes?"
"YOU can fly?"
"Wellll...."
"YOU. Are going to convince her. To TEACH. ME."
"Eh, Tohsaka, I'm really not sure you want to do that..."
"...he just duplicated the Cradle."
"UNLIMITED CARTRIDGE WORKS! There, Signum-san, will that fix your ammo shortage?"
When the Holy Grail War comes around again, it's going to be hard to say who's more surprised: the TSAB contingent (including Shirou's "little sister," Nanoha), or the Magus community.
"UNLIMITED BREAKER WORKS!"
"I never copied a sentient Noble Phant-- er, Device, before. So... what do we do with a dozen Reins?"
"SHIROU! Your little sister can fly."
"Er... yes?"
"YOU can fly?"
"Wellll...."
"YOU. Are going to convince her. To TEACH. ME."
"Eh, Tohsaka, I'm really not sure you want to do that..."
"...he just duplicated the Cradle."
"UNLIMITED CARTRIDGE WORKS! There, Signum-san, will that fix your ammo shortage?"