This is Tanrisa, wearing his robe.
It no has magical properties or powers; humbility is Tanrisa's trademark.
Lanadon wearing his armored robe. The Mithril Armor on the robe was a gift from his brother, Tanrisa.
During times of war, Tanrisa is often seen wearing this full-plate of Mithril. Mithril is the most pure, material form of armor on all the Planes of Exsistance, and if combined with Tanrisa's strength, the chance of defeating him will be very small, indeed.