Splinter was inside his room, meditating. His turtle mutant sons were all out, leaving the lair to be quiet and peaceful. As he meditated, he could faintly hear footsteps in the sewers, heading towards the entrance of the laid. His ear twitched at the sound of it, and he looked towards his closed door. For a moment, he was on guard, but those footsteps resembled yours.
You were a friend to his sons and usually came over, but it made him curious on why you were coming by yourself. He assumed that Leo and the others would be hanging out with you, but maybe he was wrong. Splinter waited a few more minutes to meditate a little more, before getting back up. With a quiet sigh, he stood up calmly, using his emerald cane as support. He then started to walk out of his dojo to see if it was, indeed you.