Originally Posted by
fraggle
I quickly skimmed over your fic to see what it looked like,
As everone else already said it is impossible for any aspect of a reality marble to be passed on onto the next generation in the case of Emiya Shirou., mostly because his ability is the result of the artificial change of both his origin and element due to a very unique process. Shirou's own self was completely destroyed before Avalon started to affect his body on the day of his 'birth' and this is simply a process that cannot be replicated.
Instread of makinga Shirou mark II you should take some time to flesh out an somewhat more original character. Even without his fathers abilities he is still a descendant of the royal family of Tristain, and he will have enough inherited power form his mother side to base a character upon.
Any Child of Shirou also has the blessings of the water spirit, which you can use to slighty augment him with a gift( like walking on water as saber can) of as a plot device. However, the name of your MC is something you should really chance. Kirtsugu is not a name that any child in Halkegina would have. To be honest that fact alone made me close the tab of your fic the moment I laid eyes on it. Shirou is dead before he is even born so Expect his to act like a tristian, so no taste for ricewine too.