As a ground handler......
I always see a crew member perform a walk around before departure.
If engineering is based, then a 'groundie' will do it ALSO when present.... Morning departure, or if called out......
I've NEVER seen a pilot NOT perform some kind of walk / run around ( if it's raining! )
Us push and headset guys also perform the last check on departure..
My advice.....Always carry a raincoat!!!
Regards....