diff --git a/README.md b/README.md
index 46ce469..d1dd754 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@ npm install ffxiv-overlay-api --save
 Or import the library from jsDelivr CDN:
 
 ```html
-<script src="https://cdn.jsdelivr.net/npm/ffxiv-overlay-api@3.5/lib/overlay.min.js"></script>
+<script src="https://cdn.jsdelivr.net/npm/ffxiv-overlay-api@3.6/lib/overlay.min.js"></script>
 <script>
   const overlay = new OverlayAPI({
     extendData: true,
@@ -95,56 +95,62 @@ Checkout [Development](#development) section for more details.
 
 You can find all events available in <https://ngld.github.io/OverlayPlugin/devs/event_types>.
 
-### `OverlayAPI.addListener(event, cb)`
+### `new OverlayAPI().addListener(event, cb)`
 
 add an event listener
 
 - `@param {EventType} event` event to listen
 - `@param {Function} cb` callback function
 
-### `OverlayAPI.removeListener(event, cb)`
+### `new OverlayAPI().removeListener(event, cb)`
 
 remove a listener
 
 - `@param {EventType} event` event type which listener belongs to
 - `@param {Function} cb` function which listener to remove
 
-### `OverlayAPI.removeAllListener(event)`
+### `new OverlayAPI().removeAllListener(event)`
 
 remove all listener of one event type
 
 - `@param {EventType} event` event type which listener belongs to
 
-### `OverlayAPI.getAllListener(event)`
+### `new OverlayAPI().getAllListener(event)`
 
 get all listeners of a event
 
 - `@param {EventType} event` event type which listener belongs to
 - `@return {Array<Function>}`
 
-### `OverlayAPI.startEvent()`
+### `new OverlayAPI().startEvent()`
 
 start listening event
 
-### `OverlayAPI.endEncounter()`
+### `new OverlayAPI().endEncounter()`
 
 ends current encounter and save it
 
 - `@return {Promise<any>}`
 
-### `OverlayAPI.callHandler(msg)`
+### `new OverlayAPI().callHandler(msg)`
 
 this function allows you to call an overlay handler, these handlers are declared by Event Sources, either built into OverlayPlugin or loaded through addons like Cactbot
 
 - `@param {HandlerMessage} msg` message send to OverlayPlugin
 - `@return {Promise<EventMessage>}`
 
-### `OverlayAPI.simulateData(msg)`
+### `new OverlayAPI().simulateData(msg)`
 
 simulate triggering event once
 
 - `@param {EventMessage} msg` data same as those from OverlayPluginApi like in <https://github.com/dsrkafuu/ffxiv-overlay-api/tree/master/test>
 
+### `OverlayAPI.mergeCombatant(...args)`
+
+static function for merging combatant like pets into first player arg
+
+- `@param {...CombatantData} args`
+
 ## Development
 
 Clone this repo, then:
diff --git a/package.json b/package.json
index 01d7dbd..61e3d2e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ffxiv-overlay-api",
-  "version": "3.5.2",
+  "version": "3.6.0",
   "description": "Build your own modern FFXIV overlay with npm.",
   "keywords": [
     "ffxiv",
diff --git a/src/components/mergeCombatant.js b/src/components/mergeCombatant.js
new file mode 100644
index 0000000..2bd3c99
--- /dev/null
+++ b/src/components/mergeCombatant.js
@@ -0,0 +1,213 @@
+/**
+ * common number adds
+ * @param {...number} args
+ * @returns {number}
+ */
+function addNumber(...args) {
+  if (!args.length) {
+    return 0;
+  }
+  let sum = 0;
+  for (let i = 0; i < args.length; i++) {
+    sum += args[i] || 0;
+  }
+  return sum;
+}
+
+/**
+ * damagePct, healsPct, etc.
+ * @param {...string} args
+ * @returns {string}
+ */
+function addPct(...args) {
+  if (!args.length) {
+    return '0%';
+  }
+  let sum = 0;
+  for (let i = 0; i < args.length; i++) {
+    const exp = /([0-9]+)%/gi.exec(args[i]);
+    if (exp && exp[1]) {
+      sum += Number.parseInt(exp[1]) || 0;
+    }
+  }
+  return `${sum}%`;
+}
+
+/**
+ * directHitPct, critHitPct, etc.
+ * @param {...{ hits: number, totalHits: number }} args
+ * @returns { hits: number, hitPct: string }
+ */
+function mergeHitPct(...args) {
+  if (!args.length) {
+    return { hits: 0, hitPct: '0%' };
+  }
+  let numerator = 0;
+  let denominator = 0;
+  for (let i = 0; i < args.length; i++) {
+    numerator += args[i].hits || 0;
+    denominator += args[i].totalHits || 0;
+  }
+  if (denominator === 0 || numerator === 0) {
+    return { hits: 0, hitPct: '0%' };
+  }
+  return {
+    hits: numerator,
+    hitPct: `${Math.round((numerator / denominator) * 100)}%`,
+  };
+}
+
+/**
+ * @param {...string} args
+ * @returns {string}
+ */
+function mergeOverHealPct(...args) {
+  if (!args.length) {
+    return '0%';
+  }
+  let tsum = 0;
+  let tnum = 0;
+  for (let i = 0; i < args.length; i++) {
+    const exp = /([0-9]+)%/gi.exec(args[i]);
+    if (exp && exp[1]) {
+      const num = Number.parseInt(exp[1]) || 0;
+      if (num > 0) {
+        tsum += num;
+        tnum++;
+      }
+    }
+  }
+  if (tnum === 0) {
+    return '0%';
+  }
+  return `${Math.round(tsum / tnum)}%`;
+}
+
+/**
+ * maxHit, maxHeal, etc.
+ * @param {...{ hit: string, hitDamage: number }} args
+ * @returns { hit: string, hitDamage: number }
+ */
+function mergeMax(...args) {
+  if (!args.length) {
+    return { hit: '', hitDamage: 0 };
+  }
+  let max = { hit: '', hitDamage: 0 };
+  for (let i = 0; i < args.length; i++) {
+    if (args[i].hitDamage > max.hitDamage) {
+      max = args[i];
+    }
+  }
+  return max;
+}
+
+/**
+ * @param {...CombatantData} args
+ */
+export function mergeCombatant(...args) {
+  if (!args.length) {
+    return null;
+  }
+
+  const dps = [];
+  const last10DPS = [];
+  const last30DPS = [];
+  const last60DPS = [];
+  const hps = [];
+
+  const swings = [];
+  const hits = [];
+  const deaths = [];
+
+  const direct = [];
+  const crit = [];
+  const directCrit = [];
+
+  const damage = [];
+  const damageTaken = [];
+  const damagePct = [];
+
+  const healed = [];
+  const healsTaken = [];
+  const healsPct = [];
+  const overHeal = [];
+  const overHealPct = [];
+
+  const maxHit = [];
+  const maxHeal = [];
+
+  args.forEach((item) => {
+    dps.push(item.dps);
+    last10DPS.push(item.last10DPS);
+    last30DPS.push(item.last30DPS);
+    last60DPS.push(item.last60DPS);
+    hps.push(item.hps);
+
+    swings.push(item.swings);
+    hits.push(item.hits);
+    deaths.push(item.deaths);
+
+    direct.push({ hits: item.directHits, totalHits: item.hits });
+    crit.push({ hits: item.critHits, totalHits: item.hits });
+    directCrit.push({ hits: item.directCritHits, totalHits: item.hits });
+
+    damage.push(item.damage);
+    damageTaken.push(item.damageTaken);
+    damagePct.push(item.damagePct);
+
+    healed.push(item.healed);
+    healsTaken.push(item.healsTaken);
+    healsPct.push(item.healsPct);
+    overHeal.push(item.overHeal);
+    overHealPct.push(item.overHealPct);
+
+    maxHit.push({ hit: item.maxHit, hitDamage: item.maxHitDamage });
+    maxHeal.push({ hit: item.maxHeal, hitDamage: item.maxHealDamage });
+  });
+
+  const ret = {
+    name: args[0].name,
+
+    job: args[0].job,
+    jobType: args[0].jobType,
+
+    dps: addNumber(...dps),
+    last10DPS: addNumber(...last10DPS),
+    last30DPS: addNumber(...last30DPS),
+    last60DPS: addNumber(...last60DPS),
+    hps: addNumber(...hps),
+
+    swings: addNumber(...swings),
+    hits: addNumber(...hits),
+    deaths: addNumber(...deaths),
+
+    damage: addNumber(...damage),
+    damageTaken: addNumber(...damageTaken),
+    damagePct: addPct(...damagePct),
+
+    healed: addNumber(...healed),
+    healsTaken: addNumber(...healsTaken),
+    healsPct: addPct(...healsPct),
+    overHeal: addNumber(...overHeal),
+    overHealPct: mergeOverHealPct(...overHealPct),
+  };
+
+  let temp = mergeHitPct(...direct);
+  ret.directHits = temp.hits;
+  ret.directHitPct = temp.hitPct;
+  temp = mergeHitPct(...crit);
+  ret.critHits = temp.hits;
+  ret.critHitPct = temp.hitPct;
+  temp = mergeHitPct(...directCrit);
+  ret.directCritHits = temp.hits;
+  ret.directCritHitPct = temp.hitPct;
+
+  temp = mergeMax(...maxHit);
+  ret.maxHit = temp.hit;
+  ret.maxHitDamage = temp.hitDamage;
+  temp = mergeMax(...maxHeal);
+  ret.maxHeal = temp.hit;
+  ret.maxHealDamage = temp.hitDamage;
+
+  return ret;
+}
diff --git a/src/index.d.ts b/src/index.d.ts
index f09e620..28fd4c6 100644
--- a/src/index.d.ts
+++ b/src/index.d.ts
@@ -99,6 +99,7 @@ interface HandlerMessage {
 }
 
 export default class OverlayAPI {
+  static mergeCombatant(...args: CombatantData[]): CombatantData;
   constructor(options: OverlayOptions);
   addListener(event: EventType, cb: EventCallback): void;
   removeListener(event: EventType, cb: EventCallback): void;
diff --git a/src/index.js b/src/index.js
index ae96c28..4c014bb 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,10 +1,13 @@
 import { logInfo, logError } from './components/logger';
 import { defaultOptions } from './components/defaultOptions';
 import { extendData } from './components/extendData';
+import { mergeCombatant } from './components/mergeCombatant';
 
 export default class OverlayAPI {
   // singleton
   static _instance = null;
+  // function for merging combatant like pets into first player arg
+  static mergeCombatant = mergeCombatant;
 
   // settings
   _options = {};