Board Thread:Questions and Answers/@comment-29752445-20170415172945/@comment-28958062-20170416221427

Again they probably wanted Historia to ate Frieda when the thirteen years were up.

Kenny cared about Uri like Levi did to Erwin so it's not a far shot to think he cared about Reiss's family name.

About the possible reasons for Alma to die:

1) Alma was a servant, it was disgraceful for a nobleman to marry a servant expecially after the wife and children of said man died.

2) Kenny didn't want Rod to have other children so he could have a better shot to take the power for himself.