Phil was a young adult man with short-cut black hair. He wore the standard uniform of the Garrison.
Phil appeared to be a man who was easily agitated. When Titans invaded Trost District, he was unable to focus on his squad's tasks due to his fear for his comrades in the vanguard. This aspect of his personality was again shown when he delivered news of the Colossus and Armored Titans reappearances within Wall Rose, appearing very frantic as he relayed his information to Pixis and Erwin. His tendency to panic also lead him to say inappropriate things, as seen when he reminded Hannes that Eren, Armin, and Mikasa were part of the vanguard during Trost's breach, although he quickly realized his error.
Despite this, Phil was a dedicated soldier, as he boldly participated in the mission to rescue Eren from the Colossus and Armored Titans alongside his fellow soldiers.
After Trost District is attacked by the Colossus Titan and breaks down, Phil and the rest of his squad take up positions atop Wall Rose to serve as lookouts, in case the Colossus Titan returns. As Hannes admires the traps that were laid out along the wall for approaching Titans, Phil expresses his fear for their comrades in the vanguard. Phil notes Eren, Armin, and Mikasa have been sent to the front lines, before abruptly apologizing for bringing it up.
Phil accompanies Hannes when the latter reports to Hange Zoë that there is no breach in Wall Rose. He witnesses Bertolt Hoover and Reiner Braun's revelation to be the Colossus and Armored Titans, and witnesses their fight with the Survey Corps, and Eren Yeager's kidnapping.
In the aftermath, he is sent to report to Commander Pixis that there is no breach in Wall Rose, and that three Titans were found hiding in the 104th Training Corps. He then returns to Wall Rose with Erwin's soldiers to aid in Eren's rescue.
Phil accompanies Floch Forster to retrieve Zeke Yeager from Levi Ackerman and the soldiers guarding him. En route they come across a wounded Levi, with Zeke nowhere in sight. Hange Zoë flees with Levi's body, but before the group gives chase Zeke emerges from a Titan's decomposing corpse. Zeke and the Yeagerists proceed to Shiganshina.
They arrive to find Shiganshina under siege from Marley. As Zeke aids Eren, Floch leads the Yeagerists in an attack against the Cart Titan. Although they initially have the upper hand, the soldiers accompanying the Cart are able to outsmart the Yeagerists and wipe them out, leaving Floch as the only survivor.