He sure didn't give a [parasitic bomb] about Clovis though, who was one of his closest relatives
Except for that one part where he was throwing up over and over again and having panic attacks in the shower after killing Clovis.
Ironically, Clovis was a racist douche bag, but that's the way he was brought up. It was confirmed that out of all the royal family members, he cared the most about Lelouch/Nunnaly, and Marianne. Enough to the point that he'd take up control area 11 to simply to take revenge on the country that allegedly killed them.
Also the special OP for 24-25> World's End> [tornado fang] ALI PROJECT.
Although he actual animation for 24-25 sucked balls as it was just random stock photos flying about.