Bonkotsu Shinpei no Monster Life@COMIC

In an imperial research facility, a calamity-class enhanced monster awakens after 200 years. Inside it is the soul of the former soldier Eunos. In despair by his own monstrous appearance, he thinks "At this rate, they’ll just try to kill me!", and resolves to find a way to coexist with humans. Wasting no time, he uses his incredible physical abilities of enhanced vision and invisibility to defeat vicious monsters and save humans! But as he can only growl, he ends up a target of the military!
(Source: Manga Mirai)