How to Terminate the Dragon Conqueror

Skynet is having a hard time terminating the Northern Europe Resistance due to there close connections with dragons, So they sent the T-1000 to the past to terminate Hiccup before he encounters the Dragons, so they won't be a threat in the future. But the Resistance has sent one of there own to the past to protect Hiccup. Will she be able to protect him or will Skynet succeed?