Again, this is not an endorsement to spend real cash on this game. I am not recommending or saying you are obligated in any way to spend real money on this game. It is perfectly acceptable to be free-to-play.
You can purchase 2 survivors for your HQ, Shirley and Taylor.
Shirley is not a good value as she increases your march size and hero attack which will increase the power of all your squads by a small amount. She starts at $10 and gets expensive very quickly.
Taylor is a better buy as she will grant you more and higher level treasure chests from your radar missions. At $5 you can get her at 0 stars and she will grant you 5 Rare Explorer Chests. Leveling her gets expensive very quickly but if you are willing to spend $150 you can get her to 4 stars which will upgrade you to 25 Deluxe Adventurer Chests. It will cost you another $100 to get her to 5 stars which I don’t really recommend as that only grants you an additional 5 Deluxe Adventurer Chests.
You can get Taylor by going to your VIP window (VIP button top left below your avatar while viewing your base). If you only want her at 0 stars you can scroll back to VIP 1 and purchase her package for $5.
If you want to spend the $150 then you can scroll back to VIP 6 and purchase her package for $50 and then scroll to VIP 7 and purchase a second package for $100 which will grant you 340 shards and allow you to level her up to 4 stars. You can also purchase packages in VIP 2-6 if you want to spend in smaller increments over a longer period of time at $10+$20+$20+$50+$50 which also equals $150 and grants you 345 shards. You only need 325 shards to get her to 4 stars and the extra shards don’t do anything for you.

