Jennifer sounds like a good older sister .
BTW, I didn't quite get how Mirai's self-esteem seems alarming. Isn't she just being Japanese here?“There are always moments when I think about leaving skating, but when I think about that I’m not very smart and I’m not very pretty and there’s nothing else that stands out about me besides my skating.” she said, though she certainly comes across as bright and funny and is unquestionably attractive.
“So it’s like the love of my life. It’s like loving someone. You want to break up sometimes but if you get past those hardships everything will come together.”
If she had said her first statement in Japanese (i.e., "I'm not very smart and I'm not very pretty"), people would just take it as socially appropriate manners for a bright, charming girl like Mirai.
She actually makes a positive comment about her skating ("stands out"). She then talks about love with a great insight (that's how she is smart). She expresses her faith in ultimate success with a resilience to overcome hardships ("if you get past those hardships everything will come together").
I just read her comment as being mature enough to face these conflicting emotions. It seems that she sees her skating as something worth living for ("love of my life"), that she wants to shine through it ("stands out"), and that she is committed enough to go through hardships because she loves skating so much.