When Barret asks if you're alright:
"(Be strong)" (+2 Barret)
"(I don't know if I can hold on)" (-3 Barret, +1 Tifa)

If Aeris is chosen as the Don's date:
"You all right?" (-2 Tifa)
"We've gotta help Aeris!!" (+3 Tifa)

When everyone lands in the sewer:
Talk to Aeris first: (+3 Aeris)
Talk to Tifa first: (+3 Tifa)

When Marlene tells you about Aeris:
"I don't know" (-3 Aeris, +3 Tifa)
"Let's hope so" (+3 Aeris, -3 Tifa)

When you first meet Red XIII:
"Tifa, I'm countin' on you!" (-2 Tifa)
"Barret, take care of her!" (+2 Barret)

If any of the following are in your party after you agree to split up:
Barret (+2 Barret)
Tifa (+2 Tifa)
Aeris (+2 Aeris)

When Tifa asks if you can break out:
"(Leave it to me)" (+1 Tifa) (as many times as you like)
"(Kinda hard)" (-1 Tifa) (as many times as you like)

Kalm

Talking to a woman in Kalm, who says Mako energy is convenient:
"You're full of it" (+1 Tifa) if Tifa is in party

Fort Condor

When you first talk to the old guy in Fort Condor:
"I guess so" (+5 Barret, +3 Aeris, +3 Tifa, +2 Yuffie)

After the old guy tells you about his problem:
"All right" (+5 Barret, +3 Aeris, +3 Tifa, +2 Yuffie)

Gold Saucer

Depending on who you choose first to accompany you in the Gold Saucer:
Aeris: (+3 Aeris)
Tifa: (+3 Tifa)
Yuffie: (+3 Yuffie)
Red XIII: --

Depending on who you choose first to accompany Barret to see Dyne:
Aeris: (+10 Aeris)
Tifa: (+3 Tifa)
Yuffie: (+2 Yuffie)
Red XIII: --