Can a PC use the force power "Influence" on another PC to get him to do something?

INFLUENCE: "The character may attempt to guide, shape, and even twist the thoughts and feelings of others."

One of the PCs wanted to make another PC do something by using this force power, but the other PC said that you can't make a PC do something that he doesn't want to do.

While there is nothing stopping you RAW, it's generally considered bad form to roll a check against another PC. A situation like the one described in the OP would be even worse. A PC affecting the thoughts of another PC is a recipe for disaster both in and out of game.

You would definitely want to make sure the other character's player is okay with it before anything is done in character.

These questions happen during the initial group meeting - Session Zero - where players can discuss how these decisions will impact their collaborative story.

Without buy-in from players, would YOU want to play in a game against hordes of Imperial Stormtroopers, Hutt crimelords...and your fellow so-called heroes? How long might your character want to play or help the same people who, in essence, brainwashed them to do whatever was against their initial plan? If you feel uneasy about playing in a game like this, consider how your influenced PC may feel.

In the films you dont really see people getting mind controlled , pretty much its minor things like asking them to overlook things or drop things , it took 2 jedi masters and Anakin to overpower a stronger character like Cad Bane and even then all they did the was cause him a lot of pain and asked him to lead them to somehwhere, they couldnt actually get him to reveal anything. Given that Cad Bane is probably about the same or slighly better than a PC willpower wise, and that this was against Mace Windu , Obi-wan and Anakin Id say getting a pc to drop an item or ignore you for a few minutes might be doable (with hefty difficulty) but to act against their nature would be a no-no.

Can a PC use the force power "Influence" on another PC to get him to do something?

Per the rules? Nothing says you cant.

At my table? PVP is off limits. There'd better be a VERY good reason or else you can't do it. Period, full stop, end of story.

(EDIT - also who knew that d a m n was filtered out by the board censors)

This can very easily lead to a pvp situation.

"You influence me? F*%+ you I draw my light saber."

Thankfully this system has no special rules making PCs immune to interaction skills or powers like Influence. If you don't want to be swayed, increase Willpower (and Presence to a lesser extent) and Discipline (and Cool to a lesser extent), get ranks of Nobody's Fool (doesn't work against some uses of Influence) and possibly take the Suppress power if you're Force sensitive. If you chose not to do any of these things, then your character is as easy to sway as everybody else.

As cimmerianthief notes, this is something that should ideally be discussed during Session Zero when you're hammering out the social contract at the table. Some groups are able to detach themselves from their characters sufficiently that they don't have a problem with their characters' actions being influenced by more persuasive characters, and an opposed check may be an easier way to resolve two characters being locked in a dispute than splitting the party or having the game grind to a halt. On the flip side, some players are heavily invested in their own agency over their character and will not tolerate anyone else having an impact on what their character does under any circumstances.

It's always hard to navigate player vs. player actions, and generally they should not be allowed, but... they will likely happen.

In my game a player bounty hunter went to assassinate a crafty imperial officer whom, after shooting another party member (to the point of inflicting a severe critical), threw down his blaster rifle and surrendered.

Not bound by the morale obligations of playing an aspiring Jedi, she declared her intentions to shoot the imperial dead.

In this instance I told the other Jedi in training that allowing this type of action would inflict conflict on them, as it was within their power to stop him.

I allowed the force sensitive players to use the force power Move to disarm the bounty hunter, although she quickly tumbled forward and grabbed the imperials own weapon and killed him with it.

So I actually instigated the Player v. Player in this instance.

In your situation if the power being used is for selfish, malicious, or otherwise evil purposes, you can allow it, but let the player know there will be a hefty amount conflict awarded for the action, I would say 20 points for your situation and as upwards as 30 for straight up damage inflicting abilities like harm.

This penalty is intentionally high, as the characters should be trusted allies and friends and doing such an act should cause a heavy burden on a characters soul. This will likely deter your player from using their force powers frivolously on other party members.

Having played lots of L5R and WOD I see nothing wrong with PC's using powers and skills against other PC's. But that should be a group call as some people don't like that kind of thing. It's never bothered me and I've learned to roll with the punches so to speak.

For me, it's always been a call based on my gut feeling. I've had immature players that have jumped to confrontation with a combative and petty attitude, but then I've had players who roll with it. I appreciate it when I can tell a player, "Your character is now feeling like X" or "believes X to be true" and they can just roleplay it. More often than not, hilarity ensues.

I like Darths & Droids' take on this, check out the "restraining bolt" joke that runs a few through several strips starting here http://www.darthsanddroids.net/episodes/0694.html

and ending here

http://www.darthsanddroids.net/episodes/0706.html