The character of Two Bit is a rather underwritten one. Besides being just another member of the gang he is used to show loyalty and support when he and Ponyboy are confronted and he breaks a bottle to threaten the soc's. I think one can surmise that he and Darry are similarly serious but Darry does not mask it with jocularity. Just curious but why do you need the info (at your age)?
I NEED SOME TOUGH ONESS