Robustus has been watching over Chimera since she arrived, making sure she is resting comfortably even though she is secured in ener-cuffs for her and everyone elses' safety. He's been waiting for Megatron to come to check in on her as well as to give him a report in person. Shred has been in here, working hard to repair any and all of her fellow Decepticons that need it, to the exclusion of all other things.. not even particularly noticing Robustus. Shred continues with her work, somehow not even noticing Megatron’s presence in the med lab.