Someone to Say Tadaima To
Sorry for the gratuitous Japanese in this one.
It was silly and more than a bit strange, but Yoshi still couldn't bear to put forth the effort of breaking the habit, so every day when he came home he'd open the door, take off his hat, and call out, "Tadaima!"
He was pretty sure the only thing that kept him from going crazy with loneliness every time he said it was that every day Splinter squeaked back at him, and though it didn't exactly sound like "Okaeri nasai," well, it was close enough. And every day Yoshi would open the cage and the rat which was all he had left of Tang Shen would scamper up his sleeve and he would feed it cheese or fruit while he murmured to it, glad of someone, something, to come to home to.
It was silly and more than a bit morbid, but Splinter couldn't bear to break the tradition, so every time his sons left the lair he would get up, move to within earshot of the door, and call out, "Itteirasshai!"
He was pretty sure the only thing that kept him from physically dragging them all back to the safety of his arms was the fact that every time he said it, four voices would call back "ittekimasu!" And every time Splinter would listen as his sons left and he would sit and meditate and try to convince himself that when they came back and he called out "tadaima," all four voices would be there to call out "okaeri nasai!"