About: If David joined the meca pilot academy, it wasn't only for the glory and defense of the Haremverse. It was mostly to make love to many men in skin-tight suits. In that regard, David prefers keeping his bust out, a way to show off his muscles and flirt. His obsession could be his undoing on the battlefield.
David has similar outfit to Kamina's, that differs in coloring and the removal of all tattoos. He does the same signature "towards the heavens" pose first stated to Simon in Gurren Lagann. David's affection scenes either relate to Kamina shooting with Yoko's gun, or to his stamina to with stand attacks/fighting spirit.
