Out of curiosity I counted all the lines of FFVII characters in the original game. Note this is not a manual count. What I did is to:

1. Paste the script from RPGamer to excel and end up with speakers and actions on the first column
2. Replaced all named with Name@ and used @ to separate unique values into different coumns
- I messed up here but Im too busy to correct 3. Used COUNTIF function to count the leftover speakers in the first column while actions might have been separated by the @ sign. Might.

Edit: Nanaki is searched under two names so the two figures is his

So I can say these lines are approximate rather than exact. Probably actual is a bit less