Tomas is a tall, well built man. He has shaggy dark hair with a thin goatee and mustache. He is commonly seen wearing the uniform of the Scout Regiment with a white v-neck underneath.
Tomas is a trusted soldier, as he stood alongside other superiors such as Miche Zacharius and Nanaba. He is shown to be very strong, both physically and mentally as he pushed 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.
It is shown that earlier he is seen alongside Miche Zacharius and Nanaba while they monitor members of the 104th Cadet Corps who are suspected to be accomplices of Annie. As they discuss the possibility of an ally to Annie being among them, Miche smells several Titans coming from the south side of Wall Rose and he quickly tells Tomas to alert the commanders.