well, tried to find some dynamic pose, put him in battle and I think the 4th is good enough
ATTENTION MANY WORDS, lil bit of his story:
this is the the dawn guardian. he protects the sun so that it can rise in the morning and a new day will come.
from whom he defends: basically the creatures of darkness. and more often - dark birds('cause his altar is in the mountains). they have no entrails, there just feathers and skull, ribs stick out. they breathe fire sometimes, and when it happens, the chest begins to light up (they are magical creatures, everything can be), while scorching their belly, so, in fact, the birds and lost half of the flesh. further their creation by the dark lord continued in their present form. but, still the eyes light up (they stayed in the skull to see the Guardian). the task of those birds is to extinguish the sun before dawn, because the sunlight incinerate birds, leaving no dust.
back to the Guardian. the main weapon is a sword(rapier), completely light, as if it does not exist, so fighting for it is a kind of ritual, a dance with darkness. he has runes on his palms, which are the same as on the hilt of the sword, not allowing it to slip out of his hands or if this happens, then he takes it like a Jedi.
about the armor:
the main colors are white and gold. I have no idea what kind of metal it is. but if the enemy was stronger or too many, and they tear the Guardian to pieces - he's collecting in parts over again, like nothing was. he can be completely defeated if the dark creatures reach the sun. though, if a new day comes for many centuries, than he wins all that time. maybe some day it will be changed hehe.
rays of light spill from the wounds instead of blood . The Guardian fully restores after sunrise to continue his guard at night.
he is a spirit; ethereal. there is only light in the armor. and he is faceless, so he wears a golden mask.
I'll add something else if I remember what I wanted to add
We omit the fact that the sun is a star in space
