Derek Morgan

Derek Morgan is a fictional character on the CBS crime drama Criminal Minds, portrayed by Emmy Award winner Shemar Moore. Morgan specializes in fixations and obsessive behaviors. He is a Supervisory Special Agent of the FBI's Behavioral Analysis Unit, (although has served as interim unit chief for Aaron Hotchner), and has appeared from the series' pilot episode "Extreme Aggressor", which was originally broadcast on September 22, 2005. Before he left in season 11, he was one of only three main characters to appear since the first season as "starring", while also becoming the only character to appear in all episodes. Morgan is shown over the series being flirtatious towards the team's technical analyst Penelope Garcia (Kirsten Vangsness). However, the relationship is platonic. He is shown to be confident and assertive, along with being very protective towards Spencer Reid (Matthew Gray Gubler), whom he helps to pick up girls. He is the muscle of the team, and usually storms in when a suspect requires apprehending physically. He officially resigned from the BAU in Season Eleven in order to be with his new family. His position was taken over by Luke Alvez in Season Twelve. 

Derek shares a special relationship with Technical Analyst Penelope Garcia. In "Penelope", Derek's love for his "Baby Girl" was evident as he stayed by her side protecting her and caring for her during her recovery. Penelope's love for her "Hot Stuff" and "Gorgeous" (as she calls Derek) was also evident in Mayhem and Lessons Learned as she sat with her face full of fear and terror at the thought of losing him. 

Derek and Penelope have had no romantic involvement, but the deep love they share is proof positive that they have a lifelong bond because neither one can survive without the other. They have a sibling-like bond. In "Exit Wounds", Derek and Penelope shared a room when the team had to double up due to lack of rooms, prompting Penelope to call dibs with Morgan. Her boyfriend Kevin quickly became jealous, calling him a "Muscle-Bound Modern-Day 007", Penelope quickly retorting that he's more of a Jason Bourne. After she witnessed a murder, she ran towards the victim causing Morgan to be mad at her, commenting on that behavior as reckless. Then Morgan wanted to conduct a cognitive interview which made Penelope angry. Towards the end of the episode, they made up per usual.