Eventually , the group learns that Enter merged into an Enetron tank to convert it into a cocoon .
When Ryuji promises to kill Hiromu if needed and Yoko having faith they can save him , Hiromu thanks them as he entrusts them with his life .
The group learns that Enter merged into an Enetron tank to convert it into a cocoon .
When Ryuji promises to kill Hiromu if needed and Yoko having faith they can save him , Hiromu thanks them as he entrusts them with his life .