describe the character of the ficitional character?
vulnerable and underestimated, she  is the girl who removes her heart from her sleeve in 'Bring the Pain', she is "immensely kind and patient"
Izzie Stevens
Rhimes explained that Izzie's character in this episode came "full-circle" from her role in the pilot: "Izzie, so vulnerable and underestimated when we first meet her, is the girl who removes her heart from her sleeve in 'Bring the Pain'." Discussing Izzie's personality in a 2006 "Cosmopolitan" interview, Heigl assessed that she is "immensely kind and patient". When Denny died in the season season finale "Losing My Religion", Rhimes discussed the impact it had on Izzie, noting that Izzie is forced to abandon her idealism, which in turn leads to her letting go of medicine. In the aftermath of Denny's death, Heigl came to believe that Izzie was not cut out to be a doctor. 
what is denny's real name from grey's anatomy Jeffrey Dean Morgan is "izzie stevens" a fictional character? Yes, Izzie was created by "Grey's Anatomy" producer who was the producer? Shonda Rhimes
wiki:2720588
Izzie Stevens [SEP] Characterization
Heigl explained: "They really hurt somebody, and they didn't seem to be taking a lot of responsibility for it. I have a really hard time with that kind of thing. I'm maybe a little too black and white about it. I don't really know Izzie very well right now. She's changed a lot." Attempting to rationalise Izzie's actions, Heigl later assessed that: People who are so infallible, perfect and moral tend to be the first to slip and fall. But I would love to see how she deals with the consequences of what she's done, because what's interesting is when people make decisions that shake their world, they suddenly have to go, 'Woo, I didn't know I was capable of this.' I'd like to see Izzie take some culpability.