#1. In CiC words: "i" = [I]
C = 子音
Examples: Brim, chick, fig, him, limb, pins, win
In the following video, Rachel uses "EE" instead of [i] and "IH" instead of [I]. But that's just a spelling difference.
#2. In CiCe words: "i" = [ai]
This sounds the same as "アイ."
Examples: bribe, chime, fine, knife, lime, slide
#3. In Cind words: "i" = [ai]
This sounds the same as "アイ."
It's certainly possible that I missed other single-syllable "i" patterns. Please let me know if you think I did!