As a Weasley, Elena was actually assigned to Hufflepuff. She had a crush on James Potter, a very popular heartthrob at the time. By accident, she met the potion genius in the next door yard and accidentally pushed him over. It is hard to imagine how he felt when he found out about Elena's first love [Manual Dog Head]
James: Okay Snotlout. What kind of ecstasy did you give Elena to make her run away with you?!
Snape: What kind of curse did you cast on Elena and take away her first love?!
James: Who would want a snot-nosed guy like you??? Elena, I bet you he doesn't love you.
Elena: Gungun, you're so annoying
Snape:......
James:……
Intention: To be determined