observant

It was initially conceived as a time of fasting and penitence, not unlike Lent, during which observant Christians prepared themselves to celebrate the birth of Jesus Christ at Christmas.

In My First Coup d'Etat, Mahama Jr describes himself as "an observant child with an active imagination and an unbounded curiosity".

It never condescends to Sisters Barnes and Paxton and they always have sound rebuttals at the ready; they are also observant, smart and canny.

Skepticism abounds, even from one of the most observant former players, Brandon McCarthy, who pitched for the Dodgers and Yankees.

“Heather serves as the voice of the audience because she’s so honest. She’s very observant, she doesn’t sit back on her opinions, and her opinions are usually correct.”