heh simply conclusion, always watch at your opponent with 400+ invisible ini ;o

80

I probably sound dumb but what does initiative do and how can you tell how high/low initiative an enemy has?

It determines which unit goes first between ninja positions.

And you'll know if your opponent is lower if you go before they do.

This work in arena/matsuri etc?

Need someone to check and confirm whether or not this work in zenith, just went a few rounds going after someone when the round says "[I] go first". Screwed me up royally since I was already battling with extreme lag.

Yes, it works in Zenith. Got outsped in every round despite ini advantage from round, because I didn't have Minato assist yet. Need to get him before next Zenith.