Characters in Nanoha also happen to have Barrier Jackets the majority of the time, and Nanoha herself is [i]very[/i] good at calculating the necessary force required to exert. Besides, even she got impaled by that Scaglietti drone that crippled her Linker Core.

Second person tends to be highly similar to third person most of the time. It's actually far less of a radical shift in perspective than 3rd and 1st; in fact, at times it's pretty much limited 3rd person with differing pronouns. Not particularly hard to understand, although it is highly unorthodox due to the fact that limited 3rd person can do its job with little difficulty.