Since she can deflect attacks to someone else, Da Qiao would gladly put herself up as a target board to entice you.
Who is she:
The wife of "The Little Conqueror" Sun Ce 孙策. Da Qiao is a very minor character in the story that has virtually zero air-time. The elder of the "Two Qiao sisters", she is supposedly incredibly beautiful, but a person of few words. She can play the Qin (an ancient stringe instrument) and sing as well as her younger sister, but she seldom openly performs. It is said that she only performs for her love, Sun Ce. In the story, she became part of Zhu Ge Liang 诸葛亮's trick to ruse Zhou Yu 周瑜 to war with Cao Cao 曹操, though her effect on him was not as pronounced as that of Xiao Qiao 小乔.
Character ability 1: "National Colours 国色 (guó sè)"
In the action phase, Da Qiao can choose to use any card (both on-hand or equipped) with a "diamond" suit as ACEDIA 乐不思蜀.
Character ability 2: "Displacement 流离 (liú lí)"
Whenever Da Qiao becomes the target of ATTACK 杀, she can discard any card and divert the ATTACK to a player within her attacking range. This player cannot be the original player that used the ATTACK card.
Ability's relation to story:
There is almost no reliable link bridging these abilities to the story line. All we know is Da Qiao is beautiful, so beautiful perhaps that her beauty can mesmerize the enemies into forgetting about the battle? Pure conjecture, of course, and I have not found any direct link. The same with "Displacement". The actual translation for 流离 means to live like a wandering refugee, but there is no mention of her after Sun Ce's death that suggests anything like this.
Additional info from story:
1. Most famous achievement - Marrying Sun Ce?! Not being misogynistic here but I have not found anything of value. Please share if you have!!
2. Cause of death - Unknown! It was never mentioned in the story or in historical texts.