I really liked Fi, to tell you the truth. I know most of you think she's monotonous, but she's a little more than a "robot" in my opinion. Even if she did get a little bit annoying when she tells you your hearts are low, and when she told you your Wiimote's batteries are about to die (aka, it's on the last bar), I found it surprising when she did that. I got so involved in the game, that I'd forget everything around me, and only focus on the game. Then, all a sudden *ding* *ding* "Yeah Fi?" "Master, your health is low. I highly recommend finding hearts at the earliest moment possible." or "Master, your Wii Remote's batteries are low." "Oh, alrite Fi. I'm just gonna die though, because I have a fairy in a bottle." or *pauses game and changes batteries*
Fi has a habit of stating the obvious, and being vague when you're in dire need of help. When you first enter Eldin Volcano's summit to find the flame, Fi says that she "highly suggests looking for flames." I just cracked at this part. I couldn't stop laughing and choked on my hot chocolate I was drinking. I recovered, and said "Fi, you're so ironic. There's flames everywhere." Then at other times when I need help, I ask her for advice and she just tells me about my clothing, and the area. She's too vague when you need help, but for me, she makes up for it when I ask her about the enemy. Tip: if you die on a boss, Fi will usually have more information on them.
All in all, I really enjoy having Fi as my companion. I haven't completed Skyward Sword yet, but I know enough I will start crying really hard when she leaves me at the end. I'm just that attached to her. When I got to Eldin Volcano at the Bokoblin base when I was finding the Eldin Dragon to get his part of Song of the Hero, as soon as I noticed my items were taken away, I immediately thought of her. "CRAP. SWORD. ITEMS. GONE. FI." and then when I finally found my sword, I just sighed of relief when she popped out.
Um, yeah.. I could say more but it's getting late.