10, 42, 49 for lighthaus?
10. Who sets the other’s ringtone to something loud and obnoxious behind their back?
Neither one of them would do this, but Lewin would change Neuhaus' ringtone on his own phone to something loud, cutesy, and obnoxious.
42. What is their favorite feature of their partner?
Lewin likes Neuhaus' hands (the ones attached to his body). He likes watching them when they work. He likes the shape of them. He likes to hold them. He likes the way they feel on him.
Neuhaus likes Lewin's eyes and will take any excuse to brush his hair away just to get a look at them. (But he would never ask Lewin to cut his hair.)
49. What do they do when they’re away from each other?
Neuhaus has his mad scientist work that he's doing for Mephisto. He's either working on the Devil⭐️Punisher, synthesizing the different types of flames, or working on furthering elixir research--without using human experimentation.
Lewin has his own work as an Arch Knight and as a teacher at True Cross that consumes his time.
They're both workaholics when they're not together. Hell, they're workaholics when they're together too, one often helping the other with their work. Usually it's Lewin helping Neuhaus because he finds his experiments interesting.