I think it was implied that due to the poison he couldn't overcome his weakness of having his head cutoff but I don't think it is every truly confirmed one way or another for Doma. Yea it was Akaza and UM1 the breath of moon one. Man if they had not gotten their marks and red blades there is no way they could have killed the UM demons besides Doma and he only died due to shinobu sacrificing herself.

JacobL89 ok Sanfi13 easy as that

Working as a waitress in at her new job she finds herself not attracted to the customers normally they be happy to take a seat at any table but someone who is from a different country is little hard for her to get used to the way they people are treating her. The manager of the restaurant comes up to emma and gives her a small little advice. "You know, someone who is new here and people not getting treated correctly should not be out her doing the shifts needed." The manager says then leaves back to her job to make sure everything is ok. Emma brushed off the chat they had and goes back to do her own business. After her shift she walks back her her small apartment and uses her tips to use for food. Emma sighs and flops down on the couch exhausted from her shift. "Ugh, why can be people be so mean" talking to herself she hides her face against a decorative pillow. She murmurs "I'm constantly tired I need a break" she continues speaking to herself. She then gets up to go to the bedroom and flops on the bed. Few minutes later she fell asleep.

Use the M777 (40km with the M982 Excalibur guided artillery shell) howitzer to make her understand about her place in this world.......