The primary meaning of ddiniwed is innocent (not in the legal sense). So i would read this as You are very innocent.
I wrote "completely harmless," as, for some reason, "very harmless" and "very innocent" sound quite odd to me. I think it is because they are essentially superlatives. One is either harmless or not, innocent or not. Very harmless and very innocent sound like very legless or very pregnant to me.
As bilbobaglin says, it's "innocent" as in "naive, artless", not in the legal sense, so it works fine with a qualifier.
Ah, that makes sense, then. Because the synonym was harmless, I thought it was the legal sort.