So this is Crust's biological father, his name is Alicio, which he appeared on "Orange Sunset" which is Crust's backstory before he born, he is also Locke's younger brother and suprise, suprise which mean knuckles and crust are cousins and they didn't even know it.
And crust's biological mother, her name is Sora-su, also appeared on "Orange Sunset" she's a friend of Lara-le which is knuckle's mother
And a small doodle of the couple