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Roswaal L. Mathers (ロズワール・Ｌ・メイザース)Race: Human
Hair color: Indigo
Eye colors: yellow (left), blue (right)
Height: 186 cm (6'1'')
Weight: around 60 kg
A Margrave as well as an Imperial Wizard and Count who is a benefactor and sponsor for Emilia's bid for the throne. He has strange appearance and voice that Subaru likens to a clown. He is a highly influential individual who is also one of Lugnica's powerful mages.
(Source: Re:Zero Wiki)