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'''Vitrian Messinius''' is a [[White Consuls]] [[Space Marine Captain|Captain]] and [[Master of Recruits]] who commands [[Indomitus Crusade Fleet Tertius]]' [[Battlegroup Saint Aster]] as a [[Lord Lieutenant]].{{Fn|1b1c}}

At the time of the [[Ultramar Campaign]] Messinius was the 10th Company Captain of the White Consuls and was leading a delegation to [[Ultramar]] to request aid for his Chapter's efforts at [[Thirteenth Black Crusade|Cadia]]. However he became caught up in the [[Terran Crusade]] and accompanied the newly reborn [[Primarch]] [[Roboute Guilliman]] to [[Terra]].{{Fn|1b1c}}

After surviving the journey to [[Terra]], he took part in the [[Battle of Lion's Gate]] against the [[Daemons]] of [[Khorne]]. In that battle, Messinius commanded a scratch [[Space Marine Company|Company]] of the Terran Crusade's surviving Space Marines and a number of the [[Palatine Guard]].{{Fn|1a}} While on Terra Messinius was head of Guilliman's security.{{Fn|1b1c}} By this point Messinius learned of the fall of his Chapter's Homeworld of [[Sabatine]] and was not sure how much of the White Consuls had even survived. {{Fn|1c1d}}

After Messinius was on the reveal of his [[Indomitus CrusadeZar-Quaesitor]] for [[Belisarius Cawl]] plans 's reveal and demonstration of the [[Primaris]] [[Space Marines]], Guilliman had individual meetings with the Space Marines that accompanied him on the Terran Crusade. During his meeting with Messinius Guilliman gave him the choice combat demonstration he felt a tingle in the back of going with his neck and left to investigate. In a Torchbearer fleet to reinforce the corridor nearby he met [[White ConsulsAlpha Primus]], or stay and help the Indomitus Crusade. who believes Messinius chose has some sensitivity to stay, so Guilliman gave him the temporary rank of warp since he felt his manipulation. [[Lord LieutenantAlpha Primus]], says he is loyal to the throne and says he was given command of a group of Primaris Space Marines attached called Messinius to [[Indomitus Crusade Fleet Tertius]]' [[Battlegroup Saint Aster]]warn him, and assigned told him not to act as one of the chief advisors of trust everything [[Cassandra VanLeskusCawl]]. [[Guilliman]] also assigned him a Primaris Adjutantsays, Lieutenant but did specify that [[Ferren AreiosCawl]], Ferren's assignment has no desire to Messinius was based rule and wants the salvation on his psyche profile and simulation evaluationsmankind. At He also informed Messinius that he's different in some way than the end of their meeting standard [[GuillimanPrimaris]] gifted Messinius a [[AuramiteSpace Marines]] [[Power Fist]] and [[Plasma Pistol]] that had been customized for him, then assigned him . After they talked Messinius returned to the display hall to take finish watching the demonstration. He ordered his primaris marines and asses the status of [[Indomitus Crusade Fleet Quintus]]troops to perform a sweep, but knew they would find nothing.{{Fn|1b}}

After the reveal of the [[Primaris]] [[Space Marines]], Guilliman had individual meetings with the Space Marines that accompanied him on the Terran Crusade. During his meeting with Messinius Guilliman gave him the choice of going with a Torchbearer fleet to reinforce the [[White Consuls]], or stay and help the Indomitus Crusade. Messinius chose to stay, so Guilliman gave him the temporary rank of [[Lord Lieutenant]], he was given command of a group of Primaris Space Marines attached to [[Indomitus Crusade Fleet Tertius]]' [[Battlegroup Saint Aster]], and assigned him to act as one of the chief advisors of [[Cassandra VanLeskus]]. [[Guilliman]] also assigned him a Primaris Adjutant, Lieutenant [[Ferren Areios]], Ferren's assignment to Messinius was based on his psyche profile and simulation evaluations. At the end of their meeting [[Guilliman]] gifted Messinius a [[Auramite]] [[Power Fist]] and [[Plasma Pistol]] that had been customized for him, then assigned him to take his primaris marines and asses the status of [[Indomitus Crusade Fleet Quintus]].{{Fn|1c}} Messinius later led his battlegroup in the [[Battle of Machorta Sound]]. During the battle he led the boarding party of the Chaos [[Blackstone]] machine alongside [[Inquisitor]] [[Rostov]], successfully disabling it.{{Fn|1d1e}}

Messinius wields a relic [[Auramite]] [[Power Fist]] given to him personally by [[Roboute Guilliman]], it is painted in the [[White Consuls]] Livery and has the trim of Messinius' personal heraldry{{Fn|21c}}. Messinius also uses a more modern [[Plasma Pistol]].{{Fn|3}}

**{{Endn|1b}}: Chapter 16**{{Endn|1c}}: Chapter 20**{{Endn|1c1d}}: Chapter 24**{{Endn|1d1e}}: Chapters 36-39