the voice is alright and I like the first line since it's a definite shout, although there is some background noise that is kinda distracting and for the other lines, I'm not sure I quite get the character I'm looking for. Not to say its bad, just not what I'm thinking of for him. For the line after the shout, I think you'd need to maintain the sound of panic in his voice as this is directly after Isao has just seen his own squad members impaled on wooden spikes among a pile of bodies. For the second line as he's saying we believe its a warning, I think honestly, it's spoken too fast for him. At this point, he had some time to collect his thoughts and calm down and generally speaking, Isao way of speaking is thoughtful and semi-sleepy in a way. I give Izuru's english dub voice as a example of the sort of tone of voice I'm looking for since it's very thought out and in most situations, composed outside of particulary tramatic events and that's kinda what I want for him. For the third line, it needs to sound a bit more...I guess depressed would be the word for it as at this point, he's like thinking, what are we going to do, what can we do and if they can do this here without us knowing, how can we hope to do anything. Basically, sell the emotion of the scene to me. If you need reference material, I can provide the manga pages for them if you want that these lines reference