Complex sentence: He has no family, sprouse or heirs, (Save for his loyal half-ogre bodyguard Chukka) as he devoted his life to advancing technology, hoping to gain the respect of "his" clan, should they return.
Split into simpler sentences: He has no family, spouse or heirs, (only his loyal half-ogre bodyguard Chukka). That is because he has devoted his life to advancing technology, hoping to gain the respect of "his" clan, should they return.