Sumukha and Sudeha are the mighty sons of Lord Veerabahu, who is worshipped as the protector guard, and he is the army chief of the army of Lord Muruga. Sumukha and Sudeha were participated in the war along with him, and defeated the demon king Surapadman. They also attended the marriage ceremony of Lord Muruga, when Muruga was married with Ma Valli and Ma Devasena.
Sumukha and Sudeha were married with chaste and pious princesses, and after living a full-fledged life in the earth for many years, finally they went to the abode of Lord Muruga, the Skanda Loka, along with their wives, and they are serving there as divine gate keepers of Lord Muruga. No one can enter into the Skanda Loka, without getting the permission of Sumukha and Sudeha.
The details of Sumukha and Sudeha are found in ancient holy texts of Hinduism, and they are described as handsome and noble warrior gods. They have got the opportunity to serve Lord Muruga itself, due to their good karmic deeds, and they would be present forever in the Skanda Loka, and there is no end for them.
They used to allow the holy sages and saints like Agastiya and Narada, inside the Skanda Loka, only after getting the permission from Lord Muruga. These divine messengers would fulfil our wishes and bestow various boons to us, based on our sincere bhakti on them. Similar to worshipping Lord Muruga, we have to worship these holy divine gate keepers, in order to lead a tension-free life. They would protect us from our enemies, and would act as a guardian to us, and also would come with us, in all walks of our life.
There are lot of stories associated with the divine attendants and devotees of the Hindu gods and goddesses, and only if we thoroughly read the holy puranas, we would be aware of that. Once if we get familiarized with our holy texts, we would get a correct idea about our Hindu deities and Hindu religion.