While a well-written and acted character, it was hard to even feel sympathy for her, even in her darkest hours. She is the only daughter of Lord Tywin Lannister, the most powerful (de facto) man in Westeros. She was originally offered by Tywin as a bride for Prince Rhaegar but the Mad King refused as he was paranoid. She is instead married to the new king, Robert Baratheon. Though she hates the king and is really in love with her own twin brother Jaime.
Robert and Cersei’s “marriage” was a interesting one. He was a brute and a terrible husband. But she did have a little power over him. When she had a right to protest something (like when her son is harmed and “justice” is not done), he would yield. Mainly because half of the kingdom’s gold came from her father’s mines.
She makes an enemy out of Eddard Stark. She thought she could get him to join the Night’s Watch after he fails to oust her inbred son from the Iron Throne in favor of Stannis Baratheon. But even she didn’t expect her son to have Ned executed.
Which proves terrible as they would have traded Ned Stark for Jaime when he gets captured. Not only was her beloved brother a prisoner, but her hated brother Tyrion was Hand of the King, giving him far more power than her.
And her happiness turns sour when Joffrey is killed. Her hatred for Tyrion (as she blamed him for their mother dying in childbirth) makes her not think twice that it was the Imp that murdered her son, when it wasn’t.
She also made an enemy out of Margaery Tyrell. She married both Joffrey and Tommen, but Cersei hated her. She ends up having the beautiful new Queen arrested by her own appointed High Septon, whom is a radical.
Only to have the same done to her, haha. She ends up getting the ultimate revenge, as pretty much all the Tyrells and the High Sparrow and his men were burned alive by wildfire.
When her son jumps to his death in suicide, she crowns herself Queen. Thus making herself an enemy out of Queen Daenerys Targaryen and King Jon Snow. She does believe in the army of the dead, but dumbly decides to let the North and the Dragon Queen fight them alone.
And her risky move ends up working out for her, in the very short-term. She manages to get the upper hand on Dany in the many firsts of battles in their mini-war. But in the end, Drogon and the Mother of Dragon’s armies defeat her own and the bells of surrender are rung.
But she made Daenerys mad with rage and she ends up destroying a lot of the Red Keep castle. She ends up dying alongside her twin brother Jaime as the stone bricks fall upon them. I wasn’t sad for her, but I wasn’t happy she was gone either. It was bittersweet, to say the least.