You better learn your lesson well (слэш)

Martín realises that’s probably the first time he thinks of him as a professional and not just as one of Sergio’s misfits. Martín knows he shouldn’t be surprised, though. That man was a soldier in the Balkans. Five years ago, Andrés and him probably would have hired someone like Helsinki for their Plan.
(Andrés did hire him, Martín remembers, a sick feeling in his stomach. For the wrong plan, yes, but Andrés did pick him.)