I started making sketches and now I think that in order to bring modernity and even futurism to the character, it is worth abandoning heavy armor on the chest, and maintaining recognition at the expense of smaller but more expressive attributes, such as a helmet, weapons and so on.
Posture and body type are also extremely important. Broad shoulders, musculature, outstretched chest, solid legs.
Also in the last version, I thought it would be interesting to add a faithful companion to the character. I chose the falcon, since the culture of falconry was highly developed in Russia. It has over 2500 years of falconry history. Such hunting was extremely popular with Russian princes.