Helena

In 7-81 we briefly talked about a possible connection between Helena's personality type and Rhianna. Helena has such low self-esteem that she allows Demetrius to treat her very badly and doesn't even believe Lysander when he professes his love to her because who could possibly love so hideous a creature as she. Any thoughts on this? What do you think about Rhianna deciding to go back to Chris Brown after he has hit her? What does this say about her self respect and self worth?