Don't fall into the trap of projecting your own emotions onto this chick, thereby missing the true problem it may have. At this age, they haven't had time to form deep bonds with other chicks, certainly during the first week of life. As a general rule of thumb, you can expect no real bonds or alliances between baby chicks during the first three weeks, maybe four.
So, the chirping is likely signalling some sort of physical distress. The first thing to cover is dehydration. Make sure this new chick is drinking properly. Scoot it up to the water and dip its beak. See if it continues to drink. You might mix up a little sugar water for it in case it is suffering a little shock from the move from the feed store.
Many of us old timers here tout Poultry Nutri-drench for chicks during their first week or two to make sure they have the nutritional boost they need to properly launch. It will correct any shortage a chick might have due to slow development, causing improper assimilation of nutrients from its food. An undiluted drop alongside its beak will perk it up, and a Nutri-drench weak tea for the water bottle will continue to dispense nutrients to all three chicks.
Check the chick's poop. Check it's butt for pasting up. Clean if necessary. This is very common when a chick comes right from a feed store where they may have suffered a chill. If it has pasted up, it could be constipated. You need to watch it for a five minute stretch and see if it struggles to poop, chirping in pain as it strains, and if the poop is small and very dry. Compare it to the other chicks. Treat for constipation by giving it a little mineral or coconut oil.
You can learn a lot about the needs of your chicks by just sitting and watching them. Happy chicks are active and quiet. Unhappy chicks are the opposite.