Shadow's death was a huge loss for the Kingdom of Gehenna. He is a strong demon who never broke his alliance on the Kingdom and everybody knew that.
Umbra, who has spent his time supporting him, felt numb upon his feet and wasn't able to react wisely on his friend's death. He started going crazy and he swung his sword over and over, even killing some of the demon soldiers along their side.
"Ahhhhhh!"
"ughk-!"
"Urgh-"
"Agjlak-!"
Some of the angels were wounded by Umbra but he did not save the demon soldiers lives as well. Noticing that he has gone mad, Edwin, Ivar and Arvid decided to attack him as well.
"You've gone mad, Umbra!" Arvid exclaimed as he intercepted Umbra's attack.
"I don't care about that at all, arggh!" Umbra answered back and pushed Arvid away from him.