Solid Snake's stupendous character traits are comprehensively demonstrated when you rush in with the computer virus, covering a range from "We're counting on you" to "Change sides? I don't recall ever saying I was on yours."
Supposedly this is why Hideo Kojima had Raiden be the playable character for most of the game... because it was only through a rookie's eyes that you could really feel the awesome.
In MGS2, Ocelot steals Fortune's electromagnetic device which was the cause of all projectiles missing her, not supernatural powers of luck as she believed, after shooting her in the heart. But it is revealed her heart is located on the right side of her chest, she stands up, and as Ocelot launches a massive amount of missiles at her, she raises her hands, and despite the device being missing, the rockets all misfire anyway. Then she dies, knowing she will see her family again.
Regardless of how other fans perceive Raiden, to some, he established his Badass cred in MGS2. That no one has bothered to mention how he took on multiple RAY units, three at a time, before the final showdown with Solidus in a sword fight? Heck, an option he has available to make his fight with the RAY units even more Badass is taking them out with the Grenade Launcher instead of the Stingers! For being a rookie compared to Solid Snake, he can hold his own!
Sometimes it's the simple things, like the Power Walk moment in MGS2 with Otacon (and his sister's parrot) leading Snake and Raiden. Or Snake and Otacon's bro-tactular fistbumping right before it.
Emma's computer virus. She designed the virus to corrupt an AI that she can barely confirm the existence of, and has undoubtedly never once had access to. On top of that, she manages to manually upload it while dying of a fatal stab wound.