To cover some of the other things...
Innocent is basically what happens when Gears of Destiny happens without magic.
Some things to note from the Innocent manga just in the first 3 chapters.
1: Dearche is apparently a master chef
2: Stern wears glasses
3: Reinforce Eins is alive and teases Vita
4: Vita's a LOT more cheerful in the Innocent manga
5: Alicia has her own magic abilities in the VR system
6: Precia is a good mother and works with Lindy
7: Nanoha is not special. XP Joking aside, there's a couple of panels where Nanoha talks to Raising Heart about this
8: Levi is a good kind of crazy and silly
9: Alicia is a troll
10: Arisa has fire powers and they tend to be blue at times (I did this first, Tsuki! XP)
11: Suzuka has ice defensive powers
12: Kyrie and Amitie's father is still alive. Haven't seen Clyde, Chrono or Yuuno yet. There has been card art for Yuuno and Chrono and we've seen Linith both as a cat and as a person (two different people), so, they just haven't been introduced yet is all, I think.
And those are the things that stick out the most for the characters so far.