<p>There is no official explanation, but manga #24 has given a very important hint that can possibly be the answer (spoiler)</p>

<blockquote class="spoiler">
  <p> Trunks is officially a kaioshin apprentice, he can use kibito technique to heal other people, and since kaioshins have god ki, as kaioshin apprentice he probably has some grade of knowledge on god ki.</p>
</blockquote>

CC BY-SA 3.0
2017-05-18T21:44:47.790Z
2017-05-18T21:44:47.790Z
Pablo
<p>There is no official explanation. Even in the show none of the characters seem to care enough to question it. I like to call it SS demigod blue because that sounds cool. I'd say he just started to adapt blue god ki after feeling it from his dad and Goku. As for why this lets him fight evenly it's probably just cause there isn't going to be another arc involving him. He deserved to have this moment and the author just gave it to him.</p>

CC BY-SA 3.0
2017-05-07T04:39:42.357Z
2017-05-07T04:39:42.357Z
Ajay Paulose
<p>When goku fought Beerus, Beerus said goku's body learned from the experience the power was now his and later goku revealed that vegeta learned to harness god ki without the ritual I believe with the saiyans ability to grow stronger after each battle that's how this was possible but with trunks being half human he won't be able to fully harness saiyans god ki fully but he learned from the experience of fighting a diety and was able to somewhat harness it or if he can fully use saiyan god ki this is the form in between regular super saiyan and the god forms because he is still learning to use god ki that's what I believe </p>

CC BY-SA 4.0
2019-12-23T03:42:11.563Z
Please include relevant sources/references. Specify specific anime episodes and manga chapters, if needed.
W. Are
CC BY-SA 4.0
2019-12-18T21:54:37.457Z
2019-12-18T21:54:37.457Z
Jimmy
<p>Is it some sort of pre-God Ki that is going to eventually transcend him to the level of a God? And how was he able to even remotely fight black after Goku and his dad were already defeated?</p>

CC BY-SA 3.0
2017-05-02T21:49:11.177Z
I am 99.99% confident that no official explanation of the blue glow currently exists, so your speculation is as good as anyone else's.
David H
CC BY-SA 3.0
2017-05-02T22:20:25.343Z
There is no official explanation, but thinking it's god ki it's a decent speculation. Perhaps Trunks learnt something about god ki when he was training with Vegeta and faced Vegeta in Super Saiyan Blue
Pablo
<dragon-ball-super>
What is the blue glow around trunks SSJ2?
# What is the blue glow around trunks SSJ2?
Posted by: username_0 on 2017-05-02
Is it some sort of pre-God Ki that is going to eventually transcend him to the level of a God? And how was he able to even remotely fight black after Goku and his dad were already defeated?
**Tags:** dragon-ball-super
> **Comments:**
> **username_1**: I am 99.99% confident that no official explanation of the blue glow currently exists, so your speculation is as good as anyone else's.  
> **username_2**: There is no official explanation, but thinking it's god ki it's a decent speculation. Perhaps Trunks learnt something about god ki when he was training with Vegeta and faced Vegeta in Super Saiyan Blue  
---
## 3 answers
### Answer by username_2 on 2017-05-18. Score: 1
There is no official explanation, but manga #24 has given a very important hint that can possibly be the answer (spoiler)

> Trunks is officially a kaioshin apprentice, he can use kibito technique to heal other people, and since kaioshins have god ki, as kaioshin apprentice he probably has some grade of knowledge on god ki.
---
### Answer by username_3 on 2017-05-07. Score: 0
There is no official explanation. Even in the show none of the characters seem to care enough to question it. I like to call it SS demigod blue because that sounds cool. I'd say he just started to adapt blue god ki after feeling it from his dad and Goku. As for why this lets him fight evenly it's probably just cause there isn't going to be another arc involving him. He deserved to have this moment and the author just gave it to him.
---
### Answer by username_4 on 2019-12-18. Score: 0
When goku fought Beerus, Beerus said goku's body learned from the experience the power was now his and later goku revealed that vegeta learned to harness god ki without the ritual I believe with the saiyans ability to grow stronger after each battle that's how this was possible but with trunks being half human he won't be able to fully harness saiyans god ki fully but he learned from the experience of fighting a diety and was able to somewhat harness it or if he can fully use saiyan god ki this is the form in between regular super saiyan and the god forms because he is still learning to use god ki that's what I believe
> **Comments:**
> **username_5** (2019-12-23): Please include relevant sources/references. Specify specific anime episodes and manga chapters, if needed.  
---
