SMG0 (SMG4)

SMG0 is as innocent as he is kind-hearted, loving nothing more than playing with his avatar Fred and partner guardian Niles, before the latter began his conquest for the "perfect universe" after being corrupted by the God Box. He is very cheery and always helping those who need it, even if he doesn't know them, showing great generosity and goodwill; such as when he took the unconscious Mario, SMG3 and SMG4 to his home inside of the God Box after their ship crashed in front of him despite the fact that it almost landed on him.

He is also courageous as when he awoken inside of Eldritch SMG0, despite his worry and confusion, he was willing to give his life to allow Mario, Melony, SMG3 and SMG4 to escape the God Box alive as he believed they didn't deserve to be dragged down with his and Niles' failure and threw himself in the way of Niles to prevent Eldritch SMG0 from killing them, even though he knew it would mean his and Niles' demise. However, despite all that Niles had done, SMG0 was willing to forgive his evil half and assure him that being together was enough and encouraged him to find Fred with him again in the next life, proving he has great empathy and strength of heart for being able to forgive even Niles' horrible atrocities which caused the rest of the SMGs, along with their friends, to despise him and instead wished to help his partner find peace again.

Despite being unconscious when Niles is controlling him, a small part of SMG0 is able to manifest for a short while through Eldritch SMG0, such as when he weeped "HELP..." after Niles had murdered Spudnick in front of SMG1 and SMG2, showing horror at what his counterpart was doing while he was helpless to do anything but watch and when Niles was about to kill Melony and the others as the God Box was in the process of self-destructing, SMG0 got in the way, forcing Eldritch SMG0 to stand down and allow them to escape and helping Niles to heal his sorrows, bringing some semblance of peace to Eldritch SMG0 in its final moments.