Altivolus Hawk is the youngest member of the Cado Undecim, and the only member who has ever been recruited before he was in his 100s. Altivolus is the only perfectly calm member of the group, able to kill without any issue. He actually was recruited after killing the previous 8th member of the Cado Undecim, Haku Shiryoku, thus killing off the last member of the Cado Undecim with a Japanese name. Altivolus spent most of his life, not understanding why he existed. He has no previous memories of a family, or of anything since he was 10. He only remembers the smiling face of someone who he thinks may have taken care of him. After joining the Cado Undecim, he was partnered with Dementis Shredder.