Thomas is a well-built man of average height. He has dark semi-long hair parted in the middle with a dark goatee and mustache. He is commonly seen wearing the uniform of the Survey Corps with a white v-neck underneath.
Thomas is a trusted soldier, as he stood alongside other superiors such as Mike Zacharias and Nanaba. He is shown to be very strong, both physically and mentally as he pushes himself to travel on horseback for several hours in order to get the news of Wall Rose's breach to Commander Erwin as fast as possible, only taking a short minute-long break in Ehrmich District to tell the citizens of the Titan invasion.
Thomas is one of several soldiers brought by Mike Zacharias to oversee members of the 104th Training Corps who are suspected to be accomplices of Annie Leonhart. As they discuss the possibility of an ally to Annie being among them, Mike smells several Titans coming from the south side of Wall Rose and he quickly tells Thomas to alert the commanders.
Soon after, Thomas arrives in Ehrmich District on horseback, bringing a warning of the incoming Titans and telling the citizens to evacuate. He gets off his horse and quickly drinks a bottle of water, telling the people that the Titans appeared in the south-west and that they had seen a group of about ten of them. After his explanation and drink, he gets up and asks them for the fastest horse they have, so he can get the news to Erwin Smith.
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