EmpireGuests.xml

<?xml version="1.0" encoding="utf-8" ?>
<Patch>
    <Operation Class="PatchOperationFindMod">
        <mods>
            <li>Royalty</li>
        </mods>
        <match Class="PatchOperationSequence">
            <operations>
            <!-- Guests -->
                <li Class="PatchOperationAdd">
                    <xpath>/Defs/QuestScriptDef/root[@Class="QuestNode_Sequence"]/nodes/li[@Class="QuestNode_IsSet"]/node[@Class="QuestNode_GetRandomPawnKindForFaction"]/choices</xpath>
                    <value>
                        <li>
                            <factionDef>OtterPirate</factionDef>
                            <pawnKinds>
                                 <li>OtterRiver</li> 
                                 <li>OtterSea</li>
                            </pawnKinds>
                        </li>  
                    </value>
                </li>
                <!-- Mercenaries -->
                <li Class="PatchOperationAdd">
                    <xpath>/Defs/QuestScriptDef/root[@Class="QuestNode_Sequence"]/nodes/li[@Class="QuestNode_GetRandomPawnKindForFaction"]/choices</xpath>
                    <value>
                        <li>
                            <factionDef>OtterPirate</factionDef>
                            <pawnKinds>
                                 <li>OtterRiver</li> 
                                 <li>OtterSea</li>
                            </pawnKinds>
                        </li>  
                    </value>
                </li>
            </operations>
        </match>
    </Operation>
</Patch>