Rowena is an extremely powerful natural-born witch, originally from Scotland in the 17th century (or possibly earlier).

Does Rowena actually love Crowley?

Rowena refuses to love Crowley, and was said to have been abusive towards him during his childhood, since she views love as a weakness. ... At some point, Rowena discovered her son Fergus' death, and upon reuniting with him, she would continue to refer him to as "Fergus".

Why did Rowena's eyes glow blue?

Rowena's powers unbound After finishing the incantation, the witch opens a shallow cut in their throat. From the cut, glowing purple energy emerges and turns into the magical bonds that are binding down the witch's power. ... The witch's full power is immediately restored and their eyes will glow blue to signify this.