Below is a list of Lifelines you can use to change the results of the RRA or just help things along a little.
Opt-out - The entire randomization process is an opt-out system, which means that at any point the player always has the ability to opt-out their character, which includes even after the process has been completed for their character. This erases ALL randomized assignments for the character, it is not meant as a "pick and choose" option.

Veto - This lifeline allows the player to ban any possible relationship value or person from the listing. The veto is best used for banning a relationship that conflicts with a character, or for banning a character that the player would prefer for their character to be a stranger with at the beginning or the roleplay. This life line must be used BEFORE any rolling has occurred, but I also suggest holding on to you veto until you have seen the edited version of the list for your character.

Reroll - Unlike a veto, a reroll is to be used after a character has gone through the randomizing process. A reroll allows a player to choose a relationship that they would like a second chance at. This means that if a character has rolled a "Crush" but the player doesn't like who the crush was on, then the player can choose to reroll it, but it will only be rerolled once. Alternatively, a player can also choose to reroll the relationship value if they want to keep the two characters involved but wish to change the type of relationship between them.

Restart - While Opt-out will remove the character entirely from the RRA process, restarting will simply allow a completely reroll of the entire thing for one character. Be warned that using a Restart will not bring back the Reroll or Veto option if they have already been used for the character.
Revive - This allows you to bring back a previously used lifeline, but the revived lifeline must have originally belonged to your character and not to someone else's. In other words, say used Reroll, but you wind up wanting to use it again then this will allow you to revive it. The Revive is specifically designed to be used after a Restart lifeline has been used, but it can be used whenever.

If-Then Rule - Each character is allowed to have one "if-this-then-that" Rule in place, which will act as a guideline during the relationship value rolling. Examples of Rules would be: If Love was rolled, any and all genders are allowed (useful for characters that might be hiding their sexuality or who may have experimented at some point). Or If Friends is rolled, no goat owners are allowed (perhaps because they are allergic or have a debilitating fear of goats). Rules can only be made if they include/exclude more than two characters, as Rules are specifically meant to include/exclude multiple characters. In other words, no rules that only exclude one character, such as "no characters with unnatural hair colors". If you want to exclude a specific character then use a Veto.

Note that, when listing character options, I will be adding two more options to the lot: NPC and Player's Choice. Player's Choice is self explanatory, as it allows the player to choose who their character has the specified relationship value with. NPC refers to a random character that the player can create to fill the relationship role but is not being played by any members in the roleplay. The NPC option has been included because I believe it has the chance to add some depth and/or drama to the roleplay. However, the NPC option can be DISABLED if you so choose, yay! It's enabled by default, but disabling it is a simple act of letting me know.