Caldera - character concept art

Some concept art/reference sheet for Caldera, a mysterious undead cowboy in my future story which is named Caldera as a placeholder name for now. Cal is good friends with Terravesta, a feiry turtle with a grumpy outlook on life, who trusts barely anyone but him and likes to be alone. Cal himself can be pretty charming and easily gets along with most others, though he also prefers his own company, if not due to him wanting to hide his his own history and true self. He was cursed to roam the land as an undead creature due to his unruly nature while alive. After several decades spent undead, he has atoned for this, and changed dramatically and is much kinder hearted than he once was, but still is ashamed of his past and has other issues to work out.