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'''{{PAGENAME}}''' is was an [[Ultramarines]] [[Primaris Space Marines|Primaris]] [[Lieutenant (Space Marine)|Lieutenant]] in the [[Fulminata]] demi-[[Company]].{{Fn|11a}} He has since been appointed as its [[Space Marine Captain|Captain]].{{Fn|1b}} During the [[Battle of Ikara IX]], Tyranus became acting commander of the Fulminata after the death of [[Demeter (Captain)|Demeter]].{{Fn|1b}} He was later formally appointed to Captain and led the Imperials to victory for the remainder of the campaign.{{Fn|1c}}

*{{Endn|1}}: [[Blood of Iax (Novel)]], **{{Endn|1a}}: Chapter 2**{{Endn|1b}}: Chapters 3-4**{{Endn|1c}}: Chapter 12