user7141: Does the concept of "Mara Devaputta" (The being called Mara) exist in all schools of Buddhism?
What is mentioned about that concept?

user11723: Mara , according to the specific Buddhist and Hindu Cosmology, is the leader of the heaven above Sakra, prince of the Devas (see The Thirty-one Planes of Existence).
According to Wikipedia's Mara (demon) article:

In Mahayana Buddhism. There are traditionally 
  these four types of Mara
  In traditional Buddhism, four metaphorical forms of "māra" are given:

Kleśa-māra, or Ma̋ra as the embodiment of all unskillful emotions, such as greed, hate and delusion.
Mṛtyu-māra, or Māra as death.
Skandha-māra, or Māra as metaphor for the entirety of conditioned existence.
Devaputra-māra, the deva of the sensuous realm, who tries to prevent Gautama Buddha from attaining liberation from the cycle of rebirth on the night of the Buddha´s enlightenment.


This Devaputra Mara is, according to Buddhists, a real sentient being.
He is destined to become a  Pratyeka Buddha. His followers might not be so fortunate.


The above image quoted from The Thirty-one Planes of Existence. Note especially:


Realm: 11) Devas Wielding Power over the Creation of Others (paranimmita-vasavatti deva)
Comments: These devas enjoy sense pleasures created by others for them. Mara, the personification of delusion and desire, lives here.
Cause of rebirth here:
  
  
Ten wholesome actions (MN 41)
Generosity




7141: <p>Does the concept of "Mara Devaputta" (The being called Mara) exist in all schools of Buddhism?</p>

<p>What is mentioned about that concept?</p>
 11723: <p>Mara , according to the specific Buddhist and Hindu Cosmology, is the leader of the heaven above Sakra, prince of the Devas (see <a href="https://www.accesstoinsight.org/ptf/dhamma/sagga/loka.html" rel="nofollow noreferrer">The Thirty-one Planes of Existence</a>).</p>

<p>According to Wikipedia's <a href="https://en.wikipedia.org/wiki/Mara_(demon)" rel="nofollow noreferrer">Mara (demon)</a> article:</p>

<blockquote>
  <p>In Mahayana Buddhism. There are traditionally 
  these four types of Mara
  In traditional Buddhism, four metaphorical forms of "māra" are given:</p>
  
  <ul>
  <li>Kleśa-māra, or Ma̋ra as the embodiment of all unskillful emotions, such as greed, hate and delusion.</li>
  <li>Mṛtyu-māra, or Māra as death.</li>
  <li>Skandha-māra, or Māra as metaphor for the entirety of conditioned existence.</li>
  <li>Devaputra-māra, the deva of the sensuous realm, who tries to prevent Gautama Buddha from attaining liberation from the cycle of rebirth on the night of the Buddha´s enlightenment.</li>
  </ul>
</blockquote>

<p>This Devaputra Mara is, according to Buddhists, a real sentient being.
He is destined to become a  Pratyeka Buddha. His followers might not be so fortunate.</p>

<hr>

<p><a href="https://i.stack.imgur.com/OPOKH.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/OPOKH.png" alt="enter image description here"></a></p>

<p>The above image quoted from <a href="https://www.accesstoinsight.org/ptf/dhamma/sagga/loka.html" rel="nofollow noreferrer">The Thirty-one Planes of Existence</a>. Note especially:</p>

<blockquote>
  <ul>
  <li><strong>Realm</strong>: 11) Devas Wielding Power over the Creation of Others (paranimmita-vasavatti deva)</li>
  <li><strong>Comments</strong>: These devas enjoy sense pleasures created by others for them. Mara, the personification of delusion and desire, lives here.</li>
  <li><strong>Cause of rebirth here</strong>:
  
  <ul>
  <li>Ten wholesome actions (MN 41)</li>
  <li>Generosity</li>
  </ul></li>
  </ul>
</blockquote>
