A diglycerin derivative-modified silicone comprising: halogen atom-substituted or unsubstituted monovalent hydrocarbon group having from 9 to 30 carbon atoms in a molecule; and as a hydrophilic group only a glycerin derivative group not having an oxyalkylene structure with an average value of a number of repetitions of oxyalkylene units of two or more, an average value of a number of repetitions of glycerin units being in a range of 1.5 to 2.4, the diglycerin derivative-modified silicone not comprising other hydrophilic groups in the molecule, and a ratio occupied by the monovalent hydrocarbon group in the molecule being at least 0.5 mass%, wherein the other hydrophilic group is a (poly)glycerin derivative group excluding a glycerin derivative group having an average value of the number of repetitions of glycerin units in a range of 1.5 to 2.4, or an oxyalkylene derivative group having an oxyalkylene structure with an average value of the number of repetitions of oxyalkylene units of two or more, wherein the diglycerin derivative-modified silicone is represented by the following structural formula: wherein R 1 is a halogen atom-substituted or unsubstituted monovalent hydrocarbon group having from 1 to 8 carbon atoms, an alkoxy group, a hydrogen atom, or a hydroxyl group, R 2 is a halogen atom-substituted or unsubstituted monovalent hydrocarbon group having from 9 to 30 carbon atoms, R Si is a chain organosiloxane group represented by the following general formula: wherein, R 11 is a halogen atom-substituted or unsubstituted monovalent hydrocarbon group having from 1 to 30 carbon atoms, a hydroxyl group, or a hydrogen atom, and at least one of the R 11 moieties is the monovalent hydrocarbon group; t is a number in a range of 2 to 10; and r is a number in a range of 1 to 500; or the following general formula: wherein R 11 and r are synonymous with those described above for formula, L 1 is a silylalkyl group having a siloxane dendron structure represented by the following general formula when i = 1: wherein R 3 is a halogen atom-substituted or unsubstituted, straight-chain or branched monovalent hydrocarbon group having from 1 to 30 carbon atoms; R 4 is each independently an alkyl group or phenyl group having from 1 to 6 carbon atoms; Z is a divalent organic group; i is a generation of the silylalkyl group represented by L i and is an integer of 1 to k when k is a number of generations serving as a number of repetitions of the silylalkyl group; the number of generations k is an integer from 1 to 10; L i+1 is the silylalkyl group when i is less than k, and R 4 when i = k; and h i is a number in a range of 0 to 3; and R is a group selected from R 1, R 2, R Si, L 1, and Q; and Q is a glycerin derivative group having an average value of the number of repetitions of glycerin units in a range of 1.5 to 2.4; (n1 + n2 + n3 + n4 + n5) is a number in a range of 201 to 1200; n1 is a number in a range of 100 to 1000; n2 is a number in a range of 0 to 500; n3 is a number in a range of 0 to 100; n4 is a number in a range of 0 to 100; and n5 is a number in a range of 0 to 100; when n2 = 0, at least one R moiety is R 2, and when n5 = 0, at least one R moiety is Q. wherein R 1 is a halogen atom-substituted or unsubstituted monovalent hydrocarbon group having from 1 to 8 carbon atoms, an alkoxy group, a hydrogen atom, or a hydroxyl group, R 2 is a halogen atom-substituted or unsubstituted monovalent hydrocarbon group having from 9 to 30 carbon atoms, R Si is a chain organosiloxane group represented by the following general formula: wherein R 11 and r are synonymous with those described above for formula, L 1 is a silylalkyl group having a siloxane dendron structure represented by the following general formula when i = 1: wherein R 3 is a halogen atom-substituted or unsubstituted, straight-chain or branched monovalent hydrocarbon group having from 1 to 30 carbon atoms; R 4 is each independently an alkyl group or phenyl group having from 1 to 6 carbon atoms; Z is a divalent organic group; i is a generation of the silylalkyl group represented by L i and is an integer of 1 to k when k is a number of generations serving as a number of repetitions of the silylalkyl group; the number of generations k is an integer from 1 to 10; L i+1 is the silylalkyl group when i is less than k, and R 4 when i = k; and h i is a number in a range of 0 to 3; and R is a group selected from R 1, R 2, R Si, L 1, and Q; and Q is a glycerin derivative group having an average value of the number of repetitions of glycerin units in a range of 1.5 to 2.4; (n1 + n2 + n3 + n4 + n5) is a number in a range of 201 to 1200; n1 is a number in a range of 100 to 1000; n2 is a number in a range of 0 to 500; n3 is a number in a range of 0 to 100; n4 is a number in a range of 0 to 100; and n5 is a number in a range of 0 to 100; when n2 = 0, at least one R moiety is R 2, and when n5 = 0, at least one R moiety is Q.