Bruce’s eyes crinkle when he’s concentrating.
Dick has ADHD.
Tim’s brows furrow when he’s confused.
Duke tilts his head when he’s considering something.
Jason holds pencils like he’s going to stab someone.
Luke drools when he sleeps.
Cassandra hums or sings when she’s alone with babs.
Barbara snores loudly when she sleeps.
Harper whistles during patrol.
Alfred is immortal.