Lord kalki is the avtar of lord Vishnu to be known will take birth in the end of Kaliyuga (the current yuga) and kill the Evil, When people will forget to take lord's name and dharma will vanish and all people will only have lust and anger, when people will stop believing in God and will do Sin and kill eachother Kalki would arrive and kill all of The evils from earth

10th incarnation of lord Vishnu 

Lord Shiva, the natraj is the supreme lord of the whole universe he's the destroyer of the world's and the creator too, nothing is greater than him, he loves Animals, and even if anyone tease with his child's he must destroy that person, He's the husband of Devi Sati who is reborn as Maa Parvati, He never born he never diess

THE SUPREME 

Lord Vishnu, lives in Vaikuntha Dham, He is the operator of the world whenever there's adharma he take avtar and restore the dharma, lord Vishnu loves his devotees and the one who keeps Ekadashi fast he keep his blessings with them and call them to vaikuntha dham after death so that his dearest devotee would live with his Lord

SUPREME LORD

Lord Krishna is the one and only supreme, he has lived about 5000 years ago during dwaparyuga, he has controlled the Arjuna's chariot during the kurukshetra war, The dwarkadhish one and only lord who take birth in every yuga to destroy evil and restore Dharma. He's the 8th Avtar of Lord Vishnu (Hari), Lord Krishna has been worshipped with his loved sakhi Radha, even before taking Krishna's name we say Radha, Radhakrishna, Radhekrishna.

Calm, god, supreme, all mighty, strongest

Radha Rani is the known lover of Lord Krishna, Radha is the most beautiful Women ever, she's very kind and gentle to her devotees, Because of a curse Radha Rani couldn't marry Krishna, but people say that Radha is the part of Krishna she's not a different soul and that's why they didn't get married because Radha Krishna are one soul and two bodies, 

Calm, Beautiful, Supreme Goddess 

Lord Hanuman is the one of the Legend who is exsisting somewhere in the world, he is the dearest friend and the biggest devotee of lord Ram, he is the one who burned the whole Lanka made of Gold, He has helped lord Ram to make Ram Setu along with his Vanar sena