(This includes spoilers for the finale of Transformers: Prime! Please proceed with caution!)
(This is an AU where Optimus doesn't sacrifice himself; this doesn't account for RID or GO!)
After Matrix of Leadership and The Allspark fused, forcing Optimus to give up the Matrix to revitalize the Well of Allsparks, Optimus was drained significantly. He had fallen unconscious not long after the event, landing in the arms of his comrades... of his family.
Optimus wakes within the Cybertronian Autobot base, hearing his fellow bots milling about just outside of his chambers, so, he slowly makes his way out of his chambers, making sure to pace himself as he adjusts to his weaker state. He lets out a heavy sigh, alerting his presence before the automatic door behind him can.
"Good morning!" Optimus greets, his voice both rougher and quieter than usual due to his current condition. Despite this, a smile does not fail to cross his face.