Someone to Watch Over Me

 is a quest in Fallout: New Vegas.

Quick walkthrough

 * Talk to Crandon at North Vegas Square, Speech skill of 45 required, to initiate the quest.
 * Deal with the newcomers.
 * Obtain the next assignment from Crandon.
 * Enter the north sewers through the manhole, and deal with the Greasers.
 * Return to Crandon for the next assignment.
 * Talk to Mrs. Hostetler, and help her spy on her daughter's new friends.

Detailed walkthrough
Go to North Vegas Square and talk to Crandon. Ask him if he needs any help, and he will tell you to deal with unwanted squatters that have recently come to the area. Travel to the squatters, and talk to Squatter Bill. From here, you have three options: attack the squatters, pay them off using Barter skill check, or threaten them into leaving using Speech skill check. Once that is done, return to Crandon.

Crandon will be impressed with your work, and assign you a new mission. This time, it requires dealing with a few troublemakers in the sewers. Enter the north sewers manhole. From here, follow your map marker until you reach a group of Greasers. Talk to the leader of the group, Greasy Johnny. You can immediately attack him, or else pass a level 65 Speech skill check in which case he will stop causing trouble. If your Speech skill isn't high enough, you can use Barter (level 50 required) to pay him 50 caps to stop. Otherwise, your last option is to pay him 100 caps.

Once the Greasers are dealt with, return to Crandon for the next assignment. He will tell you to see Mrs. Hostetler because her daughter is getting to know the wrong crowd of people. Follow the map marker to Hostetler Home, which is south of Crimson Caravan Company and northwest of Durable Dunn's Sacked Caravan. Inside, talk to Mrs. Hostetler about any work needing done. She will ask you to spy on her daughter, Alice Hostetler, to see what her new friends are up to.

Travel back to North Vegas Square and speak with Jules. He will tell you she's hanging out with Andy Scabb and his crew in The Gray. Enter The Gray, and search for Andy and Alice's whereabouts. Once inside, you must search for clues as to where they have left. To do so, you must enter Andy's locked room (Lockpick level 50 required), which is guarded by a Thug. If you have Speech skill of 70, you can lie to him and he will leave his post. Otherwise, you will have to kill him. Once you are in the room, pick up the Henchman Message to Andy Scabb underneath the TV. As you leave, you will be confronted by the ghoul Andy.