From the very first part of Solar Wind 1 it becomes apparent how much Federi cares about Paean. This is high-flying shenanigans between her and Wolf notwithstanding. Federi takes a backseat, watches how she runs into a wall there - and quietly steps in to fix things when they break. This is his nature.
Here's a little scene from the revised Solar Wind 1. Paean is riddled with guilt, her hands full of blood that no amount of scrubbing can wash off.