Lidar is quite unlucky in the Special he appeared in U13 he was the first to die and the same was with his appearance in the u19 novelization.
Where he was killed by the brutish sayian Nappa as the nanomites in Lidars bloodstream could not keep up with the damage the bald sayian inflicted .
Not to mention it was hinted in the novel Lidar was almost killed in action or captured a few months before the story started...


— -Speculation: I believe Genroent and maybe an other Ultra lost there lives protecting Lidar (maybe Bragg to) causing the rift between Lidar/ Bragg and Waals (that could style his hair and facial hair to the now deadman he idolized )

In the the end Lidar was just a career soldier with a stick up his butt (a nice sexy thick butt) that made his wife a widow and his daughter half an orphan .