[@GrafRoy Zeppeli]
[s]H-Hayai...![/s]

Alrighty, got a few comments. Sleep-deprived and going to bed shortly, so I'll take another look tomorrow to see if there's stuff I missed.

-The Tohsaka representative should have pretty poor Circuits, as mentioned in the roles. While it is possible for them to be freakishly good circuit-wise through chance and mutation, something to that extent is very unlikely, especially given this is before the Tohsakas even had Edelfelt power. Rin was like the first time the Tohsakas ever got a magus who could be ranked as objectively good in talent. 
-The family could not adopt someone and give him the Crest. The Crest can pretty much only be passed to direct blood relatives like children and siblings, and even then there's a good chance of rejection. Also you can usually only do the Crest transfer while they're really young for the same reason. If you want to transfer it when they're older you need a Magical Centaur Doctor to help.
-Specify the number of jewels, their elements, and their ranks.

[quote]As they store energy, Syone can also use that same piled up energy to her own advantage, releasing magecraft way more powerful than those stored in the jewels by using the energy inside them. [/quote]

-I'm not sure what this means.
-Keep in mind setting up those trap bounded fields will take time on the level of a few hours.
-Specify the kind of healing magic and her ability in it. For instance, the most common kind of healing would just speed up natural regeneration.
-The bracelets will be treated as a Magic Resistance Amulet, ergo D rank.
-What do you mean the glasses can "identify magecraft"? Like they can tell you that magecraft was used in an area or something?