"Likewise." Under normal circumstances, he would have ignored the hand L had offered, but there were slightly different circumstances in play at the moment. It was hardly the time to let his general disregard for physical contact interfere with the matters at hand, pun not intended. Besides, he'd gone to the trouble of making the illusion of having a proper heartbeat so there was no risk in him taking the offered hand in his. Better to seem as normal as possible, after all.

Thus, a simple handshake.

"And I will. As soon as I know, you'll know."