This is Isaac. After rumors circulated that the alien threat known as The Repentance are developing a super weapon, Isaac was given the mission of finding and possibly destroying whatever it is. With the pressure from his superiors to find an approach involving all remaining armies of Europe and abroad, Isaac must search all through enemy lines to salvage whatever is left of the WW2 conflict and aim in towards a single target. He just hopes he doesn't have to sacrifice Henri in the process.
This is Henri. After losing his mom during an alien air raid, Henri decided to find his father; a man he never met. Knowing little but the fact that his dad was in the French Resistance when he went missing, Henri joins the Spanish army as an Engineer in hopes that one day he can venture deep into enemy territory and track the man down. Though the cargo plane he was on did get shot down and his chances of survival are slim for his age and experience, Henri still trudges forward in hopes he will find the man who couldn't protect his mother.
This is Frank. After claiming to have crash landed in Spain, Frank and his abandoned army of clones managed to survive by reprogramming their drones to snatch wildlife and vegetation from the farthest corners of the globe in order to build and preserve their own ranch/farm/ark/zoo. Gaining inspiration from an old radio, Frank got a taste of the life humans share. So with nothing else to do, Frank aspired to enjoy everything Earth has to offer, though so far he's only delved into food and music. It's a start though...
Oh right... You can find them in The Rainy Days