1. Where are you from? Varisian by birth he grew up with his entire extended Sczarni family as they wandered from Cassomir in Taldor to Sandpoint in Varisia. Generally this route is Varisia, Nirmathas, Lastwall, Nirmathas, Molthune, Druma, Kyonin, Andoran, Taldor and back to Andoran, Isger, Druma, Molthune, Nirmathas, Lastwall, Varisia. While a dangerous route to travel the size of the family group is quite formidable, especially when every member of the group is somewhat skilled in either, fighting, re-con or magic of some degree.
2. How long have you have been in Sandpoint? Antonio has left his family who were currently in Nirmathas. He has been in Sandpoint for around a week now., but has been to the town numerous times in his lifetime and while not an expert in the city he does have more than a passing familiarity with the layout and nature of the town.
During his current time in Sandpoint he is trying to distance himself from being obviously associated with the local Sczarni families and will use Aliver "Pillbug" Podiker from the Pillbug's Pantry, as an intermediary to try and get any information he can about his sister, rather than going directly to the local Sczarni himself. He is doing this because he knows how a lot of people view Sczarni (and maybe Varisians in general) and he is trying to limit any negative feeling they may have if/when he starts asking questions. As such he will definitely be steering clear of the Fatman's Feedbag so that he isn't going to be immediately associated with the Sczarni who generally hang out there. Instead he spends time at Cracktooth's Tavern as it is central and he can pretend to be an amateur performer and associate with the theatre patrons who hang out there (as per his goals). As he is extremely fond of gambling is also spending some time at the Hagfish. Additionally he spends time at the Rusty Dragon (ie. the always present "Help Wanted" sign) eavesdropping on stories to see if he can hear anything on his sister.
He has been staying at either the Rusty Dragon as they have reasonable room prices (and due to it's owner who he is trying to learn from).
He is currently running low on funds and is trying to get a job either at a tavern or if need be at the cathedral, even though he is generally not a huge fan of physical labour or real work in general, but what is a "down on his luck merchant" to do in these hard times. He also sees doing any work on the cathedral as doing work to help pay respect to his sister.
3. Why are you there? Youngest twin sister (Allessandra) fled from the family years ago after a massive fight about marriage with his father. His mother convinced his father to leave her go as the goddess Desna had let her foresee that only by her leaving would the family escape destruction. Allesandra fled to Sandpoint where she pretended to be an orphan by the name of insert name, however the family always new that she was safe and what she was up to using their vast network of "merchant contacts" to help keep an eye on her. While living in Sandpoint she became pregnant to one of the local Sczarni (possibly the reason for the initial fight with her father), however the while affair with the local Sczarni did not work out and she ended up under the care of a local priest and sent messages to the family asking if she could return to them. The whole family were on their way to bring her home when the fire that burnt the cathedral down (during the Late Unpleasantness) and she was thought killed. The whole family arriving just after the fire, mourning at the site and then returned to their traveling.
Recently his mother has been having visions that are very confusing, his sister may yet be alive. Together she and Antonio have convinced his father and brother that he should go the town to not only pay his respects but to investigate if these visions could be true and if they are to return her (and/or her baby) if at all possible to the family. His mothers visions also indicated that the journey would be long and hard and could only be accomplished by involving a group of others. Among these others would be a short holy man made of stone (Arkin), a small golden phoenix carrying a spellbook in its talons (Bryak), a small female ferret with a weapon in each forepaw and a small silver coin tucked between its teeth (Kathra), and (something for Leigh's character). Your mother also spoke of a 'Red hand'. "Seek the one with the red hand - there you will find what you are looking for"
As Antonio's family are essentially a traveling village of merchants I see him as having contacts (though he may not know them really well) with other merchants/artisans along his family's trade route, and possibly with innkeepers/taverns the same way, in pretty much every city/town that they pass through. It would be these people where he would leave messages for his family as they travel so that he can keep them informed and finally return to them with his sister. NB: I changed his background on the PC Page to traveling merchant family from charlatan, although he still has the charlatan background in reality (ie on character sheet)
Chaotic Good: Governments should be afraid of their people.