|Matheus Johan Weiss|
|Full Name||Matheus Johan Weiss|
|Affiliation||Imperial 203rd Aerial Mage Battalion|
|Weapons & Equipments|
|Military Rank|| Major |
First Lieutenant 
|Novel||Chapter I The Dacian War (Vol. 2)|
|Manga||Chapter 12 Norden II (Vol. 5)|
|Anime||Episode 5 My First Battalion|
Matheus Johan Weiss is the Vice Commander and 2nd Company Commander of the 203rd Aerial Mage Battalion. He is originally from the Eastern Army 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.
- ↑ Abyssus abyssum invocat Chapter I Rapid Advance
- ↑ Dabit deus his quoque finem Chapter I Long range reconnaissance mission
- ↑ Plus Ultra Chapter I The Dacian War
- ↑ Plus Ultra - Chapter VII Preparation for move forwards
- ↑ Dabit deus his quoque finem - Chapter VI Operation Door Knocker
- ↑ The Finest Hour - Chapter IV How to use victory