Who is a God like unto Thee, that pardoneth iniquity, and passeth by the transgression of the remnant of his heritage? He retaineth not His anger for ever, because He delighteth in mercy. He will turn again, He will have compassion upon us; He will subdue our iniquities; and Thou wilt cast all their sins into the depths of the sea. Thou wilt perform the truth to Jacob, and the mercy to Abraham, which Thou hast sworn unto our fathers from the days of old.” Micah 7:18-20 (KJV)
The God of the Bible; Old and New Testament is now, has always been, and forever shall be the merciful GOD. “He delights in mercy” are part of the words written above.
Every living being on earth in the past, present and future have experienced His mercy. We have no right to His mercy. We do not deserve His mercy. We cannot earn it. He gives it without us even taking note of it.
Jesus said in the Sermon on the Mount, “Blessed are the merciful: for they shall obtain mercy” (Matthew 5:7).
Someone has said, “Mercy is not receiving what we actually deserve. Wrath. Grace is receiving from God what we do not deserve. Love, forgiveness of sin.” That is pretty close anyway. God loves His creation, and has sent His only beloved Son to die for our sins, and to raise Him to life again that we all might be made just in the eyes of God. All who will believe on Him.