Hera

Hera is a wife of Zeus. According to one sources she was the only wife of Zeus, though according to other sources she was the third and the last wife of Zeus. Except being his wife Hera also was his sister. She was the last daughter of Kronos and so she was a sister for Zeus. She is the most powerful and mighty goodness of Olympus. The mightiness was conditioned by her status of Zeus's wife.
She also was the cruelest goodness of Olympus. Though, according to mythology that cruelness was resulted by problems and quarrels she had with Zeus. He was mad about her cheating him so he was a cheater himself. And the anger that occupied Hera's heart found its way out in hurting women Zeus was in love with. There were a number of children born with Zeus and mortal woman. All of them were heroes and all of them were pain for Hera.
She was a patroness of hearth and fire, she was the one depicted on amulets for protecting family against troubles. Ancient Greeks describes Hera as the one who was anxious about loyalty and family values. Though, according to some myths she was punished by Zeus for have born a child from another man. She was the most powerful goodness though she was also subordinate to her husband.
The Milky Way we see in the sky is considered to be a breast milk of Hera. According to myth she was feeding Heracles, the son of Zeus and mortal woman. Though, she never new it wasn't her son. And while she was feeding a baby she found out whom he was and she threw him away. And the breast milk spilled on the sky became the Milky Way.