![2girls 3_3 :o ahoge all_fours anchor_symbol black_hair black_legwear blue-framed_eyewear blush boots brown_eyes brown_hair chou-10cm-hou-chan_(hatsuzuki's) commentary_request crossed_arms glasses grey_footwear grey_skirt hair_flaps hairband hatsuzuki_(kantai_collection) high_heel_boots high_heels highres kantai_collection knee_boots legs_apart long_sleeves miniskirt misumi_(niku-kyu) multiple_girls necktie no_shoes okinami_(kantai_collection) pantyhose pink_skirt school_uniform short_hair short_ponytail sidelocks sitting skirt turret white_legwear rating:s score:10 post #3214776](/cdn_image/preview/07/3d/073dffa65be1caa56b027be2fefa90bd.jpg)
A serious-minded person is put into non-serious situations. (also includes characters that simply look serious)
Like the trope of the same name, these pictures present someone or something of incredible badass, coolness, or charisma, but all of that is made kind of funny by a cute or silly action or object. Despite this, they maintain a completely unamused look on their faces.
Don't get this confused with "Badass Adorable" where the character is drawn looking awesome in a cute form. However, they can possibly overlap.
Put it simply:
'Baby Batman' - Badass Adorable
'Batman & Baby' - The Comically Serious