|Matheus Johan Weiss|
|Full Name||Matheus Johan Weiss|
|Affiliation||Imperial Army 203rd Air Mage Battalion|
|Weapons & Equipments|
|Military Rank||First Lieutenant|
|Novel||Chapter 5 Primeval Battalion (Vol. 1)|
|Manga||Chapter 15 Norden II (Vol. 4)|
|Anime||Episode 5 My First Battalion|
Matheus Johan Weiss a.k.a Matheus is the Vice Commander and 2nd Company Commander of the 203rd Aerial Mage Battalion. He is originally from the Eastern Front, and is appointed vice commander by Tanya.
He has a curved face, black hair and eyes. He wears his military officer suit in casual places and his battle suit during combat.
He is a prudent yet not unrelenting man. He is skilled at managing and disciplining his subordinates, making him competent at his duties. He is very concerned about his subordinates, usually taking care of the battalion in various ways and enjoying the confidence of them.
For Tanya, he is a thoughtful and reliable subordinate whom she is willing to spend much time on. She also usually chats (sometimes bickers) with him.
- Weiss has played a joke on Visha when he was drunk.