Discuss the characterization of Della in "The Gift of the Magi" by O. Henry.

In the book "The Gift of the Magi" Della is a young woman who is very much in love with her husband.  She is proud of her hair and vane about it because she finds it to be her best feature.  Yet, she is very unselfish.  She is of meager income and prides herself at being able to save money from her weekly grocery money.  She is thrifty. 

She is a simple woman of simple beauty probably not from a wealthy family in her early 20's.  She is a sweet and endearing wife who is supportive of her husband and as of yet , blind to any flaws he may have.