Will someone have access to your wallet without your device but the person manage to see your private keys and copy them without your knowledge. Will the person be able to withdraw your money or change password and block you from having access to your wallet?
Different persons have spoken extensively but I want to lay some emphasis on this that you shouldn't give much priority to your password seeing that hackers or any one that is able to get access to your coins in your wallet after been privy to your private keys wouldn't fuss the headache of blocking you or changing your password, seeing that their target is just your coins with the private keys it's a in-and-out operation leaving you with an emptied wallet. So trust no one with your private keys and never store them online but offline in a safe position. Beyond just you if any other person gets to know your private keys then your wallet is no different from someone coins in a centralized exchange.